diff --git a/dockerfiles_to_do/csci1200/default/Dockerfile b/dockerfiles_to_do/csci1200/default/Dockerfile
new file mode 100644
index 0000000..fe282d3
--- /dev/null
+++ b/dockerfiles_to_do/csci1200/default/Dockerfile
@@ -0,0 +1,88 @@
+
+FROM debian:stable-slim
+
+RUN apt-get update \
+    && apt-get -y --no-install-recommends install \
+      grep \
+      libseccomp-dev \
+      libseccomp2 \
+      procps \
+    && rm -rf /var/lib/apt/lists/*
+    
+RUN echo "deb http://deb.debian.org/debian buster-backports main" >> /etc/apt/sources.list \
+    && apt-get update \
+    && apt-get -y --no-install-recommends install \
+      clang-6.0 \
+    && apt-get -y install cmake\
+    && apt-get -y install make\
+    && rm -rf /var/lib/apt/lists/* \
+    && ln -sf /usr/bin/clang-6.0 /usr/bin/clang \
+    && ln -sf /usr/bin/clang++-6.0 /usr/bin/clang++
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends  g++ \
+    && rm -rf /var/lib/apt/lists/*
+
+
+ENV DRMEMORY_TAG release_2.6.0
+ENV DRMEMORY_VERSION 2.6.0
+ENV SUBMITTY_INSTALL_DIR /usr/local/submitty
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends wget ca-certificates rsync \
+    && mkdir -p ${SUBMITTY_INSTALL_DIR}/drmemory \
+    && cd /tmp \
+    && wget https://github.com/DynamoRIO/drmemory/releases/download/${DRMEMORY_TAG}/DrMemory-Linux-${DRMEMORY_VERSION}.tar.gz \
+    && tar -xpzf DrMemory-Linux-${DRMEMORY_VERSION}.tar.gz \
+    && rsync --delete -a /tmp/DrMemory-Linux-${DRMEMORY_VERSION}/ ${SUBMITTY_INSTALL_DIR}/drmemory \
+    && rm -rf /tmp/DrMemory* \
+    && chown -R root ${SUBMITTY_INSTALL_DIR}/drmemory \
+    && chmod -R 755 ${SUBMITTY_INSTALL_DIR}/drmemory \
+    && apt-get purge -y --auto-remove wget \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update \
+    && apt-get install -y valgrind \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update \
+    && apt-get install -y imagemagick \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update \
+    && apt-get install -y wkhtmltopdf \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update \
+    && apt-get install -y xvfb \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update \
+    && apt-get install -y time \
+    && rm -rf /var/lib/apt/lists/*
+
+ENV AnalysisTools_Version v.18.06.00
+ENV SUBMITTY_INSTALL_DIR /usr/local/submitty
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends wget \
+    && mkdir -p ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisTools \
+    && wget -nv "https://github.com/Submitty/AnalysisTools/releases/download/${AnalysisTools_Version}/count" -O ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisTools/count \
+    && wget -nv "https://github.com/Submitty/AnalysisTools/releases/download/${AnalysisTools_Version}/plagiarism" -O ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisTools/plagiarism \
+    && wget -nv "https://github.com/Submitty/AnalysisTools/releases/download/${AnalysisTools_Version}/diagnostics" -O ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisTools/diagnostics \
+    && chmod -R 755 ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisTools \
+    && apt-get purge -y --auto-remove wget \
+    && rm -rf /var/lib/apt/lists/*
+
+
+ENV AnalysisToolsTS_Version v23.06.01
+ENV SUBMITTY_INSTALL_DIR /usr/local/submitty
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends wget \
+    && mkdir -p ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisToolsTS/build \
+    && wget -nv "https://github.com/Submitty/AnalysisToolsTS/releases/download/${AnalysisToolsTS_Version}/submitty_count_ts" -O ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisToolsTS/build/submitty_count_ts \
+    && wget -nv "https://github.com/Submitty/AnalysisToolsTS/releases/download/${AnalysisToolsTS_Version}/submitty_diagnostics_ts" -O ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisToolsTS/build/submitty_diagnostics_ts \
+    && chmod -R 755 ${SUBMITTY_INSTALL_DIR}/SubmittyAnalysisToolsTS \
+    && apt-get purge -y --auto-remove wget \
+    && rm -rf /var/lib/apt/lists/*
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci2500/gdb/Dockerfile b/dockerfiles_to_do/csci2500/gdb/Dockerfile
new file mode 100644
index 0000000..98ea990
--- /dev/null
+++ b/dockerfiles_to_do/csci2500/gdb/Dockerfile
@@ -0,0 +1,22 @@
+FROM debian:stable-slim
+
+RUN apt-get update \
+    && apt-get -y --no-install-recommends install \
+      grep \
+      libseccomp-dev \
+      libseccomp2 \
+      procps \
+    && rm -rf /var/lib/apt/lists/*
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends  g++ \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update \
+    && apt-get install -y valgrind \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends  gdb \
+    && rm -rf /var/lib/apt/lists/*
+
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci2500/spim/Dockerfile b/dockerfiles_to_do/csci2500/spim/Dockerfile
new file mode 100644
index 0000000..865a0bd
--- /dev/null
+++ b/dockerfiles_to_do/csci2500/spim/Dockerfile
@@ -0,0 +1,14 @@
+FROM debian:stable-slim
+
+RUN apt-get update \
+    && apt-get -y --no-install-recommends install \
+      grep \
+      libseccomp-dev \
+      libseccomp2 \
+      procps \
+    && rm -rf /var/lib/apt/lists/*
+RUN apt-get update \
+    && apt-get install -y spim \
+    && rm -rf /var/lib/apt/lists/*
+
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci2600/java_tools/Dockerfile b/dockerfiles_to_do/csci2600/java_tools/Dockerfile
new file mode 100644
index 0000000..d966f8e
--- /dev/null
+++ b/dockerfiles_to_do/csci2600/java_tools/Dockerfile
@@ -0,0 +1,94 @@
+FROM ubuntu:18.04
+
+# Install "software-properties-common" (for the "add-apt-repository")
+RUN apt-get update && apt-get install -y \
+    software-properties-common
+# Add the "JAVA" ppa
+RUN add-apt-repository -y \
+    ppa:openjdk-r/ppa
+
+# Install OpenJDK-8
+RUN apt-get update && \
+    apt-get install -y openjdk-8-jdk && \
+    apt-get install -y ant && \
+    apt-get clean;
+
+# Fix certificate issues
+RUN apt-get update && \
+    apt-get install ca-certificates-java && \
+    apt-get clean && \
+    update-ca-certificates -f \
+    rm -rf /var/lib/apt/lists/* && \
+    rm -rf /var/cache/oracle-jdk8-installer
+
+# Setup JAVA_HOME -- useful for docker commandline
+ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/
+RUN export JAVA_HOME
+
+# Default to UTF-8 file.encoding
+ENV LANG C.UTF-8
+
+ENV SUBMITTY_INSTALL_DIR /usr/local/submitty
+ENV JUNIT_VERSION 4.12
+ENV HAMCREST_VERSION 1.3
+ENV JACOCO_VERSION 0.8.0
+
+
+# Create the necessary directories
+RUN mkdir -p ${SUBMITTY_INSTALL_DIR}/java_tools/JUnit \
+  && mkdir -p ${SUBMITTY_INSTALL_DIR}/java_tools/hamcrest \
+  && mkdir -p ${SUBMITTY_INSTALL_DIR}/java_tools/jacoco 
+
+# Get JUnit
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget \
+  && rm -rf /var/lib/apt/lists/* \
+  && echo 0 \
+  && cd ${SUBMITTY_INSTALL_DIR}/java_tools/JUnit \
+  && wget https://repo1.maven.org/maven2/junit/junit/${JUNIT_VERSION}/junit-${JUNIT_VERSION}.jar -o /dev/null > /dev/null 2>&1 \
+  && cd / \
+  && apt-get purge -y --auto-remove wget
+
+# Get Hamcrest
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget \
+  && rm -rf /var/lib/apt/lists/* \
+  && cd ${SUBMITTY_INSTALL_DIR}/java_tools/hamcrest \
+  && wget https://repo1.maven.org/maven2/org/hamcrest/hamcrest-core/${HAMCREST_VERSION}/hamcrest-core-${HAMCREST_VERSION}.jar -o /dev/null > /dev/null 2>&1 \
+  && cd / \
+  && apt-get purge -y --auto-remove wget
+
+# Get Jacoco
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget unzip \
+  && rm -rf /var/lib/apt/lists/* \
+  && cd ${SUBMITTY_INSTALL_DIR}/java_tools/jacoco  \
+  && wget https://github.com/jacoco/jacoco/releases/download/v${JACOCO_VERSION}/jacoco-${JACOCO_VERSION}.zip -o /dev/null > /dev/null 2>&1 \
+  && mkdir jacoco-${JACOCO_VERSION} \
+  && unzip jacoco-${JACOCO_VERSION}.zip -d jacoco-${JACOCO_VERSION} > /dev/null \
+  && mv jacoco-${JACOCO_VERSION}/lib/jacococli.jar jacococli.jar \
+  && mv jacoco-${JACOCO_VERSION}/lib/jacocoagent.jar jacocoagent.jar \
+  && rm -rf jacoco-${JACOCO_VERSION} \
+  && rm -f jacoco-${JACOCO_VERSION}.zip \
+  && chmod o+r . *.jar \
+  && cd / \
+  && apt-get purge -y --auto-remove wget unzip
+
+# Retrieve the Submitty Testrunner.
+# TODO: replace this with something more sustainable than a wget from master
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget \
+  && rm -rf /var/lib/apt/lists/* \
+  && wget https://raw.githubusercontent.com/Submitty/Submitty/master/junit_test_runner/TestRunner.java --output-document=${SUBMITTY_INSTALL_DIR}/java_tools/JUnit/TestRunner.java \
+  && cd ${SUBMITTY_INSTALL_DIR}/java_tools/JUnit/ \
+  && /usr/bin/javac -cp ./junit-4.12.jar TestRunner.java \
+  && cd / \
+  && apt-get purge -y --auto-remove wget
+
+
+# Fix Permissions
+RUN chown -R root:${COURSE_BUILDERS_GROUP} ${SUBMITTY_INSTALL_DIR}/java_tools \
+  && chmod -R 755 ${SUBMITTY_INSTALL_DIR}/java_tools
+
+
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci2600/java_tools_dafny/Dockerfile b/dockerfiles_to_do/csci2600/java_tools_dafny/Dockerfile
new file mode 100644
index 0000000..5d3b50f
--- /dev/null
+++ b/dockerfiles_to_do/csci2600/java_tools_dafny/Dockerfile
@@ -0,0 +1,132 @@
+FROM ubuntu:18.04
+
+# Install "software-properties-common" (for the "add-apt-repository")
+RUN apt-get update && apt-get install -y \
+    software-properties-common
+# Add the "JAVA" ppa
+RUN add-apt-repository -y \
+    ppa:openjdk-r/ppa
+
+# Install OpenJDK-8
+RUN apt-get update && \
+    apt-get install -y openjdk-8-jdk && \
+    apt-get install -y ant && \
+    apt-get clean;
+
+# Fix certificate issues
+RUN apt-get update && \
+    apt-get install ca-certificates-java && \
+    apt-get clean && \
+    update-ca-certificates -f \
+    rm -rf /var/lib/apt/lists/* && \
+    rm -rf /var/cache/oracle-jdk8-installer
+
+# Setup JAVA_HOME -- useful for docker commandline
+ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/
+RUN export JAVA_HOME
+# see CA_CERTIFICATES_JAVA_VERSION notes above
+RUN /var/lib/dpkg/info/ca-certificates-java.postinst configure
+ENV SUBMITTY_INSTALL_DIR /usr/local/submitty
+ENV JUNIT_VERSION 4.12
+ENV HAMCREST_VERSION 1.3
+ENV JACOCO_VERSION 0.8.0
+
+
+# Create the necessary directories
+RUN mkdir -p ${SUBMITTY_INSTALL_DIR}/java_tools/JUnit \
+  && mkdir -p ${SUBMITTY_INSTALL_DIR}/java_tools/hamcrest \
+  && mkdir -p ${SUBMITTY_INSTALL_DIR}/java_tools/jacoco 
+
+# Get JUnit
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget \
+  && rm -rf /var/lib/apt/lists/* \
+  && echo 0 \
+  && cd ${SUBMITTY_INSTALL_DIR}/java_tools/JUnit \
+  && wget https://repo1.maven.org/maven2/junit/junit/${JUNIT_VERSION}/junit-${JUNIT_VERSION}.jar -o /dev/null > /dev/null 2>&1 \
+  && cd / \
+  && apt-get purge -y --auto-remove wget
+
+# Get Hamcrest
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget \
+  && rm -rf /var/lib/apt/lists/* \
+  && cd ${SUBMITTY_INSTALL_DIR}/java_tools/hamcrest \
+  && wget https://repo1.maven.org/maven2/org/hamcrest/hamcrest-core/${HAMCREST_VERSION}/hamcrest-core-${HAMCREST_VERSION}.jar -o /dev/null > /dev/null 2>&1 \
+  && cd / \
+  && apt-get purge -y --auto-remove wget
+
+# Get Jacoco
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget unzip \
+  && rm -rf /var/lib/apt/lists/* \
+  && cd ${SUBMITTY_INSTALL_DIR}/java_tools/jacoco  \
+  && wget https://github.com/jacoco/jacoco/releases/download/v${JACOCO_VERSION}/jacoco-${JACOCO_VERSION}.zip -o /dev/null > /dev/null 2>&1 \
+  && mkdir jacoco-${JACOCO_VERSION} \
+  && unzip jacoco-${JACOCO_VERSION}.zip -d jacoco-${JACOCO_VERSION} > /dev/null \
+  && mv jacoco-${JACOCO_VERSION}/lib/jacococli.jar jacococli.jar \
+  && mv jacoco-${JACOCO_VERSION}/lib/jacocoagent.jar jacocoagent.jar \
+  && rm -rf jacoco-${JACOCO_VERSION} \
+  && rm -f jacoco-${JACOCO_VERSION}.zip \
+  && chmod o+r . *.jar \
+  && cd / \
+  && apt-get purge -y --auto-remove wget unzip
+
+# Retrieve the Submitty Testrunner.
+# TODO: replace this with something more sustainable than a wget from master
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget \
+  && rm -rf /var/lib/apt/lists/* \
+  && wget https://raw.githubusercontent.com/Submitty/Submitty/master/junit_test_runner/TestRunner.java --output-document=${SUBMITTY_INSTALL_DIR}/java_tools/JUnit/TestRunner.java \
+  && cd ${SUBMITTY_INSTALL_DIR}/java_tools/JUnit/ \
+  && /usr/bin/javac -cp ./junit-4.12.jar TestRunner.java \
+  && cd / \
+  && apt-get purge -y --auto-remove wget
+
+
+# Fix Permissions
+RUN chown -R root:${COURSE_BUILDERS_GROUP} ${SUBMITTY_INSTALL_DIR}/java_tools \
+  && chmod -R 755 ${SUBMITTY_INSTALL_DIR}/java_tools
+
+
+ENV MONO_VERSION 6.8.0.96
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gnupg \
+    ca-certificates \
+    wget \
+  && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    apt-transport-https \
+    dirmngr \
+  && rm -rf /var/lib/apt/lists/* \
+  && echo "deb https://download.mono-project.com/repo/ubuntu stable-bionic/snapshots/6.12.0 main" | tee /etc/apt/sources.list.d/mono-official.list \
+  && apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF \
+  && apt-get update && apt-get install -y --no-install-recommends \
+    mono-devel \
+    msbuild \
+  && rm -rf /var/lib/apt/lists/* /tmp/*
+
+ENV DAFNY_VER v2.3.0
+ENV DAFNY_FILE dafny-2.3.0.10506-x64-debian-8.11.zip
+ENV SUBMITTY_INSTALL_DIR /usr/local/submitty
+
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends wget unzip \
+  && rm -rf /var/lib/apt/lists/* \
+  && mkdir -p ${SUBMITTY_INSTALL_DIR}/Dafny \
+  && chown root:${COURSE_BUILDERS_GROUP} ${SUBMITTY_INSTALL_DIR}/Dafny \
+  && chmod -R 755 ${SUBMITTY_INSTALL_DIR}/Dafny \
+  && cd ${SUBMITTY_INSTALL_DIR}/Dafny \
+  && wget https://github.com/Microsoft/dafny/releases/download/${DAFNY_VER}/${DAFNY_FILE} \
+  && unzip $DAFNY_FILE \
+  && rm -f $DAFNY_FILE  \
+  && chmod -R 755 ${SUBMITTY_INSTALL_DIR}/Dafny \
+  && cd / \
+  && apt-get purge -y --auto-remove wget unzip
+
+# dafny requires libgomp1
+RUN apt-get update \
+  && apt-get install -y libgomp1 \
+  && rm -rf /var/lib/apt/lists/* CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci4220/instructor_python/Dockerfile b/dockerfiles_to_do/csci4220/instructor_python/Dockerfile
new file mode 100644
index 0000000..2158a7f
--- /dev/null
+++ b/dockerfiles_to_do/csci4220/instructor_python/Dockerfile
@@ -0,0 +1,254 @@
+FROM ubuntu:18.04
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# runtime dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+		netbase \
+		tzdata \
+	; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GPG_KEY 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
+ENV PYTHON_VERSION 3.7.17
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dpkg-dev \
+		gcc \
+		gnupg \
+		libbluetooth-dev \
+		libbz2-dev \
+		libc6-dev \
+		libdb-dev \
+		libexpat1-dev \
+		libffi-dev \
+		libgdbm-dev \
+		liblzma-dev \
+		libncursesw5-dev \
+		libreadline-dev \
+		libsqlite3-dev \
+		libssl-dev \
+		make \
+		tk-dev \
+		uuid-dev \
+		wget \
+		xz-utils \
+		zlib1g-dev \
+	; \
+	\
+	wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz"; \
+	wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc"; \
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify python.tar.xz.asc python.tar.xz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" python.tar.xz.asc; \
+	mkdir -p /usr/src/python; \
+	tar --extract --directory /usr/src/python --strip-components=1 --file python.tar.xz; \
+	rm python.tar.xz; \
+	\
+	cd /usr/src/python; \
+	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
+	./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--without-ensurepip \
+	; \
+	nproc="$(nproc)"; \
+	EXTRA_CFLAGS="$(dpkg-buildflags --get CFLAGS)"; \
+	LDFLAGS="$(dpkg-buildflags --get LDFLAGS)"; \
+	LDFLAGS="${LDFLAGS:--Wl},--strip-all"; \
+# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
+	PROFILE_TASK='-m test.regrtest --pgo \
+		test_array \
+		test_base64 \
+		test_binascii \
+		test_binhex \
+		test_binop \
+		test_bytes \
+		test_c_locale_coercion \
+		test_class \
+		test_cmath \
+		test_codecs \
+		test_compile \
+		test_complex \
+		test_csv \
+		test_decimal \
+		test_dict \
+		test_float \
+		test_fstring \
+		test_hashlib \
+		test_io \
+		test_iter \
+		test_json \
+		test_long \
+		test_math \
+		test_memoryview \
+		test_pickle \
+		test_re \
+		test_set \
+		test_slice \
+		test_struct \
+		test_threading \
+		test_time \
+		test_traceback \
+		test_unicode \
+	'; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:-}" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+	; \
+# https://github.com/docker-library/python/issues/784
+# prevent accidental usage of a system installed libpython of the same version
+	rm python; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:--Wl},-rpath='\$\$ORIGIN/../lib'" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+		python \
+	; \
+	make install; \
+	\
+	cd /; \
+	rm -rf /usr/src/python; \
+	\
+	find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name 'libpython*.a' \) \) \
+			-o \( -type f -a -name 'wininst-*.exe' \) \
+		\) -exec rm -rf '{}' + \
+	; \
+	\
+	ldconfig; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	apt-mark manual $savedAptMark; \
+	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
+		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
+		| sort -u \
+		| xargs -r dpkg-query --search \
+		| cut -d: -f1 \
+		| sort -u \
+		| xargs -r apt-mark manual \
+	; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	python3 --version
+
+# make some useful symlinks that are expected to exist ("/usr/local/bin/python" and friends)
+RUN set -eux; \
+	for src in idle3 pydoc3 python3 python3-config; do \
+		dst="$(echo "$src" | tr -d 3)"; \
+		[ -s "/usr/local/bin/$src" ]; \
+		[ ! -e "/usr/local/bin/$dst" ]; \
+		ln -svT "$src" "/usr/local/bin/$dst"; \
+	done
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 23.0.1
+# https://github.com/docker-library/python/issues/365
+ENV PYTHON_SETUPTOOLS_VERSION 57.5.0
+# https://github.com/pypa/get-pip
+ENV PYTHON_GET_PIP_URL https://github.com/pypa/get-pip/raw/0d8570dc44796f4369b652222cf176b3db6ac70e/public/get-pip.py
+ENV PYTHON_GET_PIP_SHA256 96461deced5c2a487ddc65207ec5a9cffeca0d34e7af7ea1afc470ff0d746207
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends wget; \
+	\
+	wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
+	echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum -c -; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	export PYTHONDONTWRITEBYTECODE=1; \
+	\
+	python get-pip.py \
+		--disable-pip-version-check \
+		--no-cache-dir \
+		--no-compile \
+		"pip==$PYTHON_PIP_VERSION" \
+		"setuptools==$PYTHON_SETUPTOOLS_VERSION" \
+	; \
+	rm -f get-pip.py; \
+	\
+	pip --version
+
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 18.1
+
+RUN set -ex; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends wget; \
+	\
+	wget -O get-pip.py 'https://bootstrap.pypa.io/get-pip.py'; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	python get-pip.py \
+		--disable-pip-version-check \
+		--no-cache-dir \
+		"pip==$PYTHON_PIP_VERSION" \
+	; \
+	pip --version; \
+	\
+	find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests \) \) \
+			-o \
+			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
+		\) -exec rm -rf '{}' +; \
+	rm -f get-pip.py
+
+# Necessary as Submitty does path expansion of commands in compiling a homework,
+# and so resolves "python" -> "/usr/bin/python"
+RUN cd /usr/bin \
+	&& ln -s /usr/local/bin/python3 python3 \
+	&& ln -s /usr/local/bin/python3 python \
+	&& ln -s /usr/local/bin/pip3 pip3 \
+	&& ln -s /usr/local/bin/pip3 pip
+	
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    python3-dev \
+    python3-pip \
+    libssl-dev \
+    zlib1g-dev \
+    libffi-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN pip3 install \
+    tftpy \
+    grpcio \
+    grpcio-tools \
+    googleapis-common-protos
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci4270/20190912/Dockerfile b/dockerfiles_to_do/csci4270/20190912/Dockerfile
new file mode 100644
index 0000000..18c377f
--- /dev/null
+++ b/dockerfiles_to_do/csci4270/20190912/Dockerfile
@@ -0,0 +1,227 @@
+FROM debian:bullseye-slim
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# runtime dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+		netbase \
+		tzdata \
+	; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GPG_KEY 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
+ENV PYTHON_VERSION 3.7.17
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dpkg-dev \
+		gcc \
+		gnupg \
+		libbluetooth-dev \
+		libbz2-dev \
+		libc6-dev \
+		libdb-dev \
+		libexpat1-dev \
+		libffi-dev \
+		libgdbm-dev \
+		liblzma-dev \
+		libncursesw5-dev \
+		libreadline-dev \
+		libsqlite3-dev \
+		libssl-dev \
+		make \
+		tk-dev \
+		uuid-dev \
+		wget \
+		xz-utils \
+		zlib1g-dev \
+	; \
+	\
+	wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz"; \
+	wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc"; \
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify python.tar.xz.asc python.tar.xz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" python.tar.xz.asc; \
+	mkdir -p /usr/src/python; \
+	tar --extract --directory /usr/src/python --strip-components=1 --file python.tar.xz; \
+	rm python.tar.xz; \
+	\
+	cd /usr/src/python; \
+	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
+	./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--without-ensurepip \
+	; \
+	nproc="$(nproc)"; \
+	EXTRA_CFLAGS="$(dpkg-buildflags --get CFLAGS)"; \
+	LDFLAGS="$(dpkg-buildflags --get LDFLAGS)"; \
+	LDFLAGS="${LDFLAGS:--Wl},--strip-all"; \
+# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
+	PROFILE_TASK='-m test.regrtest --pgo \
+		test_array \
+		test_base64 \
+		test_binascii \
+		test_binhex \
+		test_binop \
+		test_bytes \
+		test_c_locale_coercion \
+		test_class \
+		test_cmath \
+		test_codecs \
+		test_compile \
+		test_complex \
+		test_csv \
+		test_decimal \
+		test_dict \
+		test_float \
+		test_fstring \
+		test_hashlib \
+		test_io \
+		test_iter \
+		test_json \
+		test_long \
+		test_math \
+		test_memoryview \
+		test_pickle \
+		test_re \
+		test_set \
+		test_slice \
+		test_struct \
+		test_threading \
+		test_time \
+		test_traceback \
+		test_unicode \
+	'; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:-}" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+	; \
+# https://github.com/docker-library/python/issues/784
+# prevent accidental usage of a system installed libpython of the same version
+	rm python; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:--Wl},-rpath='\$\$ORIGIN/../lib'" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+		python \
+	; \
+	make install; \
+	\
+	cd /; \
+	rm -rf /usr/src/python; \
+	\
+	find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name 'libpython*.a' \) \) \
+			-o \( -type f -a -name 'wininst-*.exe' \) \
+		\) -exec rm -rf '{}' + \
+	; \
+	\
+	ldconfig; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	apt-mark manual $savedAptMark; \
+	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
+		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
+		| sort -u \
+		| xargs -r dpkg-query --search \
+		| cut -d: -f1 \
+		| sort -u \
+		| xargs -r apt-mark manual \
+	; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	python3 --version
+
+# make some useful symlinks that are expected to exist ("/usr/local/bin/python" and friends)
+RUN set -eux; \
+	for src in idle3 pydoc3 python3 python3-config; do \
+		dst="$(echo "$src" | tr -d 3)"; \
+		[ -s "/usr/local/bin/$src" ]; \
+		[ ! -e "/usr/local/bin/$dst" ]; \
+		ln -svT "$src" "/usr/local/bin/$dst"; \
+	done
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 23.0.1
+# https://github.com/docker-library/python/issues/365
+ENV PYTHON_SETUPTOOLS_VERSION 57.5.0
+# https://github.com/pypa/get-pip
+ENV PYTHON_GET_PIP_URL https://github.com/pypa/get-pip/raw/0d8570dc44796f4369b652222cf176b3db6ac70e/public/get-pip.py
+ENV PYTHON_GET_PIP_SHA256 96461deced5c2a487ddc65207ec5a9cffeca0d34e7af7ea1afc470ff0d746207
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends wget; \
+	\
+	wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
+	echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum -c -; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	export PYTHONDONTWRITEBYTECODE=1; \
+	\
+	python get-pip.py \
+		--disable-pip-version-check \
+		--no-cache-dir \
+		--no-compile \
+		"pip==$PYTHON_PIP_VERSION" \
+		"setuptools==$PYTHON_SETUPTOOLS_VERSION" \
+	; \
+	rm -f get-pip.py; \
+	\
+	pip --version
+
+# CMD ["python3"]
+
+# Necessary as Submitty does path expansion of commands in compiling a homework,
+# and so resolves "python" -> "/usr/bin/python"
+RUN cd /usr/bin \
+	&& ln -s /usr/local/bin/python3 python3 \
+	&& ln -s /usr/local/bin/python3 python \
+	&& ln -s /usr/local/bin/pip3 pip3 \
+	&& ln -s /usr/local/bin/pip3 pip
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends \
+		libfontconfig1 \
+		libglib2.0-0 \
+		libsm6 \
+		libxext6 \
+		libxrender1 \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& pip3 install \
+		numpy==1.16.4 \
+		matplotlib==3.1.0 \
+		scipy==1.3.1 \
+		opencv-contrib-python==4.1.1.26 \
+		torch==1.2.0 \
+		torchvision==0.4.0
+
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci4270/20210121/Dockerfile b/dockerfiles_to_do/csci4270/20210121/Dockerfile
new file mode 100644
index 0000000..d275465
--- /dev/null
+++ b/dockerfiles_to_do/csci4270/20210121/Dockerfile
@@ -0,0 +1,228 @@
+FROM debian:bullseye-slim
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# runtime dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+		netbase \
+		tzdata \
+	; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GPG_KEY 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
+ENV PYTHON_VERSION 3.7.17
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dpkg-dev \
+		gcc \
+		gnupg \
+		libbluetooth-dev \
+		libbz2-dev \
+		libc6-dev \
+		libdb-dev \
+		libexpat1-dev \
+		libffi-dev \
+		libgdbm-dev \
+		liblzma-dev \
+		libncursesw5-dev \
+		libreadline-dev \
+		libsqlite3-dev \
+		libssl-dev \
+		make \
+		tk-dev \
+		uuid-dev \
+		wget \
+		xz-utils \
+		zlib1g-dev \
+	; \
+	\
+	wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz"; \
+	wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc"; \
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify python.tar.xz.asc python.tar.xz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" python.tar.xz.asc; \
+	mkdir -p /usr/src/python; \
+	tar --extract --directory /usr/src/python --strip-components=1 --file python.tar.xz; \
+	rm python.tar.xz; \
+	\
+	cd /usr/src/python; \
+	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
+	./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--without-ensurepip \
+	; \
+	nproc="$(nproc)"; \
+	EXTRA_CFLAGS="$(dpkg-buildflags --get CFLAGS)"; \
+	LDFLAGS="$(dpkg-buildflags --get LDFLAGS)"; \
+	LDFLAGS="${LDFLAGS:--Wl},--strip-all"; \
+# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
+	PROFILE_TASK='-m test.regrtest --pgo \
+		test_array \
+		test_base64 \
+		test_binascii \
+		test_binhex \
+		test_binop \
+		test_bytes \
+		test_c_locale_coercion \
+		test_class \
+		test_cmath \
+		test_codecs \
+		test_compile \
+		test_complex \
+		test_csv \
+		test_decimal \
+		test_dict \
+		test_float \
+		test_fstring \
+		test_hashlib \
+		test_io \
+		test_iter \
+		test_json \
+		test_long \
+		test_math \
+		test_memoryview \
+		test_pickle \
+		test_re \
+		test_set \
+		test_slice \
+		test_struct \
+		test_threading \
+		test_time \
+		test_traceback \
+		test_unicode \
+	'; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:-}" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+	; \
+# https://github.com/docker-library/python/issues/784
+# prevent accidental usage of a system installed libpython of the same version
+	rm python; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:--Wl},-rpath='\$\$ORIGIN/../lib'" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+		python \
+	; \
+	make install; \
+	\
+	cd /; \
+	rm -rf /usr/src/python; \
+	\
+	find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name 'libpython*.a' \) \) \
+			-o \( -type f -a -name 'wininst-*.exe' \) \
+		\) -exec rm -rf '{}' + \
+	; \
+	\
+	ldconfig; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	apt-mark manual $savedAptMark; \
+	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
+		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
+		| sort -u \
+		| xargs -r dpkg-query --search \
+		| cut -d: -f1 \
+		| sort -u \
+		| xargs -r apt-mark manual \
+	; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	python3 --version
+
+# make some useful symlinks that are expected to exist ("/usr/local/bin/python" and friends)
+RUN set -eux; \
+	for src in idle3 pydoc3 python3 python3-config; do \
+		dst="$(echo "$src" | tr -d 3)"; \
+		[ -s "/usr/local/bin/$src" ]; \
+		[ ! -e "/usr/local/bin/$dst" ]; \
+		ln -svT "$src" "/usr/local/bin/$dst"; \
+	done
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 23.0.1
+# https://github.com/docker-library/python/issues/365
+ENV PYTHON_SETUPTOOLS_VERSION 57.5.0
+# https://github.com/pypa/get-pip
+ENV PYTHON_GET_PIP_URL https://github.com/pypa/get-pip/raw/0d8570dc44796f4369b652222cf176b3db6ac70e/public/get-pip.py
+ENV PYTHON_GET_PIP_SHA256 96461deced5c2a487ddc65207ec5a9cffeca0d34e7af7ea1afc470ff0d746207
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends wget; \
+	\
+	wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
+	echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum -c -; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	export PYTHONDONTWRITEBYTECODE=1; \
+	\
+	python get-pip.py \
+		--disable-pip-version-check \
+		--no-cache-dir \
+		--no-compile \
+		"pip==$PYTHON_PIP_VERSION" \
+		"setuptools==$PYTHON_SETUPTOOLS_VERSION" \
+	; \
+	rm -f get-pip.py; \
+	\
+	pip --version
+
+# CMD ["python3"]
+
+# Necessary as Submitty does path expansion of commands in compiling a homework,
+# and so resolves "python" -> "/usr/bin/python"
+RUN cd /usr/bin \
+	&& ln -s /usr/local/bin/python3 python3 \
+	&& ln -s /usr/local/bin/python3 python \
+	&& ln -s /usr/local/bin/pip3 pip3 \
+	&& ln -s /usr/local/bin/pip3 pip
+
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends \
+    build-essential \
+    libfontconfig1 \
+    libglib2.0-0 \
+    libsm6 \
+    libxext6 \
+    libxrender1 \
+  && pip3 install --upgrade pip  \
+    numpy==1.19.2 \
+    matplotlib==3.3.2 \
+    scipy==1.5.2 \
+    torch==1.6.0 \
+    torchvision==0.7.0 \
+    opencv-python \
+  && rm -rf /var/lib/apt/lists/*
+
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci4380/latest/Dockerfile b/dockerfiles_to_do/csci4380/latest/Dockerfile
new file mode 100644
index 0000000..d61cef6
--- /dev/null
+++ b/dockerfiles_to_do/csci4380/latest/Dockerfile
@@ -0,0 +1,220 @@
+FROM debian:bullseye-slim
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# runtime dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+		netbase \
+		tzdata \
+	; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GPG_KEY 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
+ENV PYTHON_VERSION 3.7.17
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dpkg-dev \
+		gcc \
+		gnupg \
+		libbluetooth-dev \
+		libbz2-dev \
+		libc6-dev \
+		libdb-dev \
+		libexpat1-dev \
+		libffi-dev \
+		libgdbm-dev \
+		liblzma-dev \
+		libncursesw5-dev \
+		libreadline-dev \
+		libsqlite3-dev \
+		libssl-dev \
+		make \
+		tk-dev \
+		uuid-dev \
+		wget \
+		xz-utils \
+		zlib1g-dev \
+	; \
+	\
+	wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz"; \
+	wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc"; \
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify python.tar.xz.asc python.tar.xz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" python.tar.xz.asc; \
+	mkdir -p /usr/src/python; \
+	tar --extract --directory /usr/src/python --strip-components=1 --file python.tar.xz; \
+	rm python.tar.xz; \
+	\
+	cd /usr/src/python; \
+	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
+	./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--without-ensurepip \
+	; \
+	nproc="$(nproc)"; \
+	EXTRA_CFLAGS="$(dpkg-buildflags --get CFLAGS)"; \
+	LDFLAGS="$(dpkg-buildflags --get LDFLAGS)"; \
+	LDFLAGS="${LDFLAGS:--Wl},--strip-all"; \
+# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
+	PROFILE_TASK='-m test.regrtest --pgo \
+		test_array \
+		test_base64 \
+		test_binascii \
+		test_binhex \
+		test_binop \
+		test_bytes \
+		test_c_locale_coercion \
+		test_class \
+		test_cmath \
+		test_codecs \
+		test_compile \
+		test_complex \
+		test_csv \
+		test_decimal \
+		test_dict \
+		test_float \
+		test_fstring \
+		test_hashlib \
+		test_io \
+		test_iter \
+		test_json \
+		test_long \
+		test_math \
+		test_memoryview \
+		test_pickle \
+		test_re \
+		test_set \
+		test_slice \
+		test_struct \
+		test_threading \
+		test_time \
+		test_traceback \
+		test_unicode \
+	'; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:-}" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+	; \
+# https://github.com/docker-library/python/issues/784
+# prevent accidental usage of a system installed libpython of the same version
+	rm python; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:--Wl},-rpath='\$\$ORIGIN/../lib'" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+		python \
+	; \
+	make install; \
+	\
+	cd /; \
+	rm -rf /usr/src/python; \
+	\
+	find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name 'libpython*.a' \) \) \
+			-o \( -type f -a -name 'wininst-*.exe' \) \
+		\) -exec rm -rf '{}' + \
+	; \
+	\
+	ldconfig; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	apt-mark manual $savedAptMark; \
+	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
+		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
+		| sort -u \
+		| xargs -r dpkg-query --search \
+		| cut -d: -f1 \
+		| sort -u \
+		| xargs -r apt-mark manual \
+	; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	python3 --version
+
+# make some useful symlinks that are expected to exist ("/usr/local/bin/python" and friends)
+RUN set -eux; \
+	for src in idle3 pydoc3 python3 python3-config; do \
+		dst="$(echo "$src" | tr -d 3)"; \
+		[ -s "/usr/local/bin/$src" ]; \
+		[ ! -e "/usr/local/bin/$dst" ]; \
+		ln -svT "$src" "/usr/local/bin/$dst"; \
+	done
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 23.0.1
+# https://github.com/docker-library/python/issues/365
+ENV PYTHON_SETUPTOOLS_VERSION 57.5.0
+# https://github.com/pypa/get-pip
+ENV PYTHON_GET_PIP_URL https://github.com/pypa/get-pip/raw/0d8570dc44796f4369b652222cf176b3db6ac70e/public/get-pip.py
+ENV PYTHON_GET_PIP_SHA256 96461deced5c2a487ddc65207ec5a9cffeca0d34e7af7ea1afc470ff0d746207
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends wget; \
+	\
+	wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
+	echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum -c -; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	export PYTHONDONTWRITEBYTECODE=1; \
+	\
+	python get-pip.py \
+		--disable-pip-version-check \
+		--no-cache-dir \
+		--no-compile \
+		"pip==$PYTHON_PIP_VERSION" \
+		"setuptools==$PYTHON_SETUPTOOLS_VERSION" \
+	; \
+	rm -f get-pip.py; \
+	\
+	pip --version
+
+# CMD ["python3"]
+# Necessary as Submitty does path expansion of commands in compiling a homework,
+# and so resolves "python" -> "/usr/bin/python"
+RUN cd /usr/bin \
+	&& ln -s /usr/local/bin/python3 python3 \
+	&& ln -s /usr/local/bin/python3 python \
+	&& ln -s /usr/local/bin/pip3 pip3 \
+	&& ln -s /usr/local/bin/pip3 pip
+
+RUN apt-get update \
+    && apt-get -y --no-install-recommends install \
+        libxml2-dev \
+        libxslt-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN pip3 install \
+        psycopg2-binary \
+        lxml
+
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/csci4430/20190912/Dockerfile b/dockerfiles_to_do/csci4430/20190912/Dockerfile
new file mode 100644
index 0000000..ed010e1
--- /dev/null
+++ b/dockerfiles_to_do/csci4430/20190912/Dockerfile
@@ -0,0 +1,247 @@
+FROM debian:bullseye-slim
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# runtime dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+		netbase \
+		tzdata \
+	; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GPG_KEY 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
+ENV PYTHON_VERSION 3.7.17
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dpkg-dev \
+		gcc \
+		gnupg \
+		libbluetooth-dev \
+		libbz2-dev \
+		libc6-dev \
+		libdb-dev \
+		libexpat1-dev \
+		libffi-dev \
+		libgdbm-dev \
+		liblzma-dev \
+		libncursesw5-dev \
+		libreadline-dev \
+		libsqlite3-dev \
+		libssl-dev \
+		make \
+		tk-dev \
+		uuid-dev \
+		wget \
+		xz-utils \
+		zlib1g-dev \
+	; \
+	\
+	wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz"; \
+	wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc"; \
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify python.tar.xz.asc python.tar.xz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" python.tar.xz.asc; \
+	mkdir -p /usr/src/python; \
+	tar --extract --directory /usr/src/python --strip-components=1 --file python.tar.xz; \
+	rm python.tar.xz; \
+	\
+	cd /usr/src/python; \
+	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
+	./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--without-ensurepip \
+	; \
+	nproc="$(nproc)"; \
+	EXTRA_CFLAGS="$(dpkg-buildflags --get CFLAGS)"; \
+	LDFLAGS="$(dpkg-buildflags --get LDFLAGS)"; \
+	LDFLAGS="${LDFLAGS:--Wl},--strip-all"; \
+# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
+	PROFILE_TASK='-m test.regrtest --pgo \
+		test_array \
+		test_base64 \
+		test_binascii \
+		test_binhex \
+		test_binop \
+		test_bytes \
+		test_c_locale_coercion \
+		test_class \
+		test_cmath \
+		test_codecs \
+		test_compile \
+		test_complex \
+		test_csv \
+		test_decimal \
+		test_dict \
+		test_float \
+		test_fstring \
+		test_hashlib \
+		test_io \
+		test_iter \
+		test_json \
+		test_long \
+		test_math \
+		test_memoryview \
+		test_pickle \
+		test_re \
+		test_set \
+		test_slice \
+		test_struct \
+		test_threading \
+		test_time \
+		test_traceback \
+		test_unicode \
+	'; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:-}" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+	; \
+# https://github.com/docker-library/python/issues/784
+# prevent accidental usage of a system installed libpython of the same version
+	rm python; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:--Wl},-rpath='\$\$ORIGIN/../lib'" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+		python \
+	; \
+	make install; \
+	\
+	cd /; \
+	rm -rf /usr/src/python; \
+	\
+	find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name 'libpython*.a' \) \) \
+			-o \( -type f -a -name 'wininst-*.exe' \) \
+		\) -exec rm -rf '{}' + \
+	; \
+	\
+	ldconfig; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	apt-mark manual $savedAptMark; \
+	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
+		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
+		| sort -u \
+		| xargs -r dpkg-query --search \
+		| cut -d: -f1 \
+		| sort -u \
+		| xargs -r apt-mark manual \
+	; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	python3 --version
+
+# make some useful symlinks that are expected to exist ("/usr/local/bin/python" and friends)
+RUN set -eux; \
+	for src in idle3 pydoc3 python3 python3-config; do \
+		dst="$(echo "$src" | tr -d 3)"; \
+		[ -s "/usr/local/bin/$src" ]; \
+		[ ! -e "/usr/local/bin/$dst" ]; \
+		ln -svT "$src" "/usr/local/bin/$dst"; \
+	done
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 23.0.1
+# https://github.com/docker-library/python/issues/365
+ENV PYTHON_SETUPTOOLS_VERSION 57.5.0
+# https://github.com/pypa/get-pip
+ENV PYTHON_GET_PIP_URL https://github.com/pypa/get-pip/raw/0d8570dc44796f4369b652222cf176b3db6ac70e/public/get-pip.py
+ENV PYTHON_GET_PIP_SHA256 96461deced5c2a487ddc65207ec5a9cffeca0d34e7af7ea1afc470ff0d746207
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends wget; \
+	\
+	wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
+	echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum -c -; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	export PYTHONDONTWRITEBYTECODE=1; \
+	\
+	python get-pip.py \
+		--disable-pip-version-check \
+		--no-cache-dir \
+		--no-compile \
+		"pip==$PYTHON_PIP_VERSION" \
+		"setuptools==$PYTHON_SETUPTOOLS_VERSION" \
+	; \
+	rm -f get-pip.py; \
+	\
+	pip --version
+
+# CMD ["python3"]
+
+# Necessary as Submitty does path expansion of commands in compiling a homework,
+# and so resolves "python" -> "/usr/bin/python"
+RUN cd /usr/bin \
+    && ln -s /usr/local/bin/python3 python3 \
+    && ln -s /usr/local/bin/python3 python \
+    && ln -s /usr/local/bin/pip3 pip3 \
+    && ln -s /usr/local/bin/pip3 pip
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        netbase \
+        ca-certificates \
+        dirmngr \
+        gnupg2 \
+        wget \
+    && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 2EAF8B8BB12873F5 \
+    && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA3CBA3FFE22B574 \
+    && echo "deb http://downloads.haskell.org/debian stretch main" >> /etc/apt/sources.list \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends \
+        emacs \
+        cabal-install-3.0 \
+        emacsen-common \
+        ghc-8.8.1 \
+        tk-dev \
+    && update-alternatives --config opt-ghc \
+    && update-alternatives --config opt-cabal \
+    && wget -qO- https://get.haskellstack.org/ | sh \
+    && ln -s /opt/ghc/bin/ghc /usr/bin/ghc \
+    && ln -s /opt/ghc/bin/cabal /usr/bin/cabal \
+    && ln -s /usr/local/bin/stack /usr/bin/stack \
+    && stack install QuickCheck \
+    && wget https://github.com/mozart/mozart2/releases/download/v2.0.1/mozart2-2.0.1-x86_64-linux.deb -O /tmp/mozart.deb \
+    && dpkg -i /tmp/mozart.deb \
+    && apt-get install -f \
+    && rm -rf /tmp/mozart.deb \
+    && apt-get purge --auto-remove -y \
+        ca-certificates \
+        dirmngr \
+        gnupg2 \
+        wget \
+    && rm -rf /var/lib/apt/lists/*
+
+
+
diff --git a/dockerfiles_to_do/csci4430/20191022/Dockerfile b/dockerfiles_to_do/csci4430/20191022/Dockerfile
new file mode 100644
index 0000000..2bb1823
--- /dev/null
+++ b/dockerfiles_to_do/csci4430/20191022/Dockerfile
@@ -0,0 +1,253 @@
+FROM ubuntu:18.04
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# runtime dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+		netbase \
+		tzdata \
+	; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GPG_KEY 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
+ENV PYTHON_VERSION 3.7.17
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dpkg-dev \
+		gcc \
+		gnupg \
+		libbluetooth-dev \
+		libbz2-dev \
+		libc6-dev \
+		libdb-dev \
+		libexpat1-dev \
+		libffi-dev \
+		libgdbm-dev \
+		liblzma-dev \
+		libncursesw5-dev \
+		libreadline-dev \
+		libsqlite3-dev \
+		libssl-dev \
+		make \
+		tk-dev \
+		uuid-dev \
+		wget \
+		xz-utils \
+		zlib1g-dev \
+	; \
+	\
+	wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz"; \
+	wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc"; \
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify python.tar.xz.asc python.tar.xz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" python.tar.xz.asc; \
+	mkdir -p /usr/src/python; \
+	tar --extract --directory /usr/src/python --strip-components=1 --file python.tar.xz; \
+	rm python.tar.xz; \
+	\
+	cd /usr/src/python; \
+	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
+	./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--without-ensurepip \
+	; \
+	nproc="$(nproc)"; \
+	EXTRA_CFLAGS="$(dpkg-buildflags --get CFLAGS)"; \
+	LDFLAGS="$(dpkg-buildflags --get LDFLAGS)"; \
+	LDFLAGS="${LDFLAGS:--Wl},--strip-all"; \
+# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
+	PROFILE_TASK='-m test.regrtest --pgo \
+		test_array \
+		test_base64 \
+		test_binascii \
+		test_binhex \
+		test_binop \
+		test_bytes \
+		test_c_locale_coercion \
+		test_class \
+		test_cmath \
+		test_codecs \
+		test_compile \
+		test_complex \
+		test_csv \
+		test_decimal \
+		test_dict \
+		test_float \
+		test_fstring \
+		test_hashlib \
+		test_io \
+		test_iter \
+		test_json \
+		test_long \
+		test_math \
+		test_memoryview \
+		test_pickle \
+		test_re \
+		test_set \
+		test_slice \
+		test_struct \
+		test_threading \
+		test_time \
+		test_traceback \
+		test_unicode \
+	'; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:-}" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+	; \
+# https://github.com/docker-library/python/issues/784
+# prevent accidental usage of a system installed libpython of the same version
+	rm python; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:--Wl},-rpath='\$\$ORIGIN/../lib'" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+		python \
+	; \
+	make install; \
+	\
+	cd /; \
+	rm -rf /usr/src/python; \
+	\
+	find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name 'libpython*.a' \) \) \
+			-o \( -type f -a -name 'wininst-*.exe' \) \
+		\) -exec rm -rf '{}' + \
+	; \
+	\
+	ldconfig; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	apt-mark manual $savedAptMark; \
+	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
+		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
+		| sort -u \
+		| xargs -r dpkg-query --search \
+		| cut -d: -f1 \
+		| sort -u \
+		| xargs -r apt-mark manual \
+	; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	python3 --version
+
+# make some useful symlinks that are expected to exist ("/usr/local/bin/python" and friends)
+RUN set -eux; \
+	for src in idle3 pydoc3 python3 python3-config; do \
+		dst="$(echo "$src" | tr -d 3)"; \
+		[ -s "/usr/local/bin/$src" ]; \
+		[ ! -e "/usr/local/bin/$dst" ]; \
+		ln -svT "$src" "/usr/local/bin/$dst"; \
+	done
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 23.0.1
+# https://github.com/docker-library/python/issues/365
+ENV PYTHON_SETUPTOOLS_VERSION 57.5.0
+# https://github.com/pypa/get-pip
+ENV PYTHON_GET_PIP_URL https://github.com/pypa/get-pip/raw/0d8570dc44796f4369b652222cf176b3db6ac70e/public/get-pip.py
+ENV PYTHON_GET_PIP_SHA256 96461deced5c2a487ddc65207ec5a9cffeca0d34e7af7ea1afc470ff0d746207
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends wget; \
+	\
+	wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
+	echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum -c -; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	export PYTHONDONTWRITEBYTECODE=1; \
+	\
+	python get-pip.py \
+		--disable-pip-version-check \
+		--no-cache-dir \
+		--no-compile \
+		"pip==$PYTHON_PIP_VERSION" \
+		"setuptools==$PYTHON_SETUPTOOLS_VERSION" \
+	; \
+	rm -f get-pip.py; \
+	\
+	pip --version
+
+# CMD ["python3"]
+
+# Necessary as Submitty does path expansion of commands in compiling a homework,
+# and so resolves "python" -> "/usr/bin/python"
+RUN cd /usr/bin \
+    && ln -s /usr/local/bin/python3 python3 \
+    && ln -s /usr/local/bin/python3 python \
+    && ln -s /usr/local/bin/pip3 pip3 \
+    && ln -s /usr/local/bin/pip3 pip
+
+# Erlang. Source: https://github.com/erlang/docker-erlang-otp/blob/9d6dc777222b850cb652100fff03e102ab4265ac/22/slim/Dockerfile
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    erlang \
+    && rm -rf /var/lib/apt/lists/*
+# Java8
+#
+# Source: https://github.com/docker-library/openjdk/blob/master/8/jdk/slim/Dockerfile
+#
+
+# A few reasons for installing distribution-provided OpenJDK:
+#
+#  1. Oracle.  Licensing prevents us from redistributing the official JDK.
+#
+#  2. Compiling OpenJDK also requires the JDK to be installed, and it gets
+#     really hairy.
+#
+#     For some sample build times, see Debian's buildd logs:
+#       https://buildd.debian.org/status/logs.php?pkg=openjdk-8
+
+# Install "software-properties-common" (for the "add-apt-repository")
+RUN apt-get update && apt-get install -y \
+    software-properties-common
+# Add the "JAVA" ppa
+RUN add-apt-repository -y \
+    ppa:openjdk-r/ppa
+
+# Install OpenJDK-8
+RUN apt-get update && \
+    apt-get install -y openjdk-8-jdk && \
+    apt-get install -y ant && \
+    apt-get clean;
+
+# Fix certificate issues
+RUN apt-get update && \
+    apt-get install ca-certificates-java && \
+    apt-get clean && \
+    update-ca-certificates -f \
+    rm -rf /var/lib/apt/lists/* && \
+    rm -rf /var/cache/oracle-jdk8-installer
+
+# Setup JAVA_HOME -- useful for docker commandline
+ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/
+RUN export JAVA_HOME
\ No newline at end of file
diff --git a/dockerfiles_to_do/csci4430/prolog_20191122/Dockerfile b/dockerfiles_to_do/csci4430/prolog_20191122/Dockerfile
new file mode 100644
index 0000000..380c26f
--- /dev/null
+++ b/dockerfiles_to_do/csci4430/prolog_20191122/Dockerfile
@@ -0,0 +1,246 @@
+FROM debian:bullseye-slim
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# runtime dependencies
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		ca-certificates \
+		netbase \
+		tzdata \
+	; \
+	rm -rf /var/lib/apt/lists/*
+
+ENV GPG_KEY 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
+ENV PYTHON_VERSION 3.7.17
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dpkg-dev \
+		gcc \
+		gnupg \
+		libbluetooth-dev \
+		libbz2-dev \
+		libc6-dev \
+		libdb-dev \
+		libexpat1-dev \
+		libffi-dev \
+		libgdbm-dev \
+		liblzma-dev \
+		libncursesw5-dev \
+		libreadline-dev \
+		libsqlite3-dev \
+		libssl-dev \
+		make \
+		tk-dev \
+		uuid-dev \
+		wget \
+		xz-utils \
+		zlib1g-dev \
+	; \
+	\
+	wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz"; \
+	wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc"; \
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify python.tar.xz.asc python.tar.xz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" python.tar.xz.asc; \
+	mkdir -p /usr/src/python; \
+	tar --extract --directory /usr/src/python --strip-components=1 --file python.tar.xz; \
+	rm python.tar.xz; \
+	\
+	cd /usr/src/python; \
+	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
+	./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--without-ensurepip \
+	; \
+	nproc="$(nproc)"; \
+	EXTRA_CFLAGS="$(dpkg-buildflags --get CFLAGS)"; \
+	LDFLAGS="$(dpkg-buildflags --get LDFLAGS)"; \
+	LDFLAGS="${LDFLAGS:--Wl},--strip-all"; \
+# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
+	PROFILE_TASK='-m test.regrtest --pgo \
+		test_array \
+		test_base64 \
+		test_binascii \
+		test_binhex \
+		test_binop \
+		test_bytes \
+		test_c_locale_coercion \
+		test_class \
+		test_cmath \
+		test_codecs \
+		test_compile \
+		test_complex \
+		test_csv \
+		test_decimal \
+		test_dict \
+		test_float \
+		test_fstring \
+		test_hashlib \
+		test_io \
+		test_iter \
+		test_json \
+		test_long \
+		test_math \
+		test_memoryview \
+		test_pickle \
+		test_re \
+		test_set \
+		test_slice \
+		test_struct \
+		test_threading \
+		test_time \
+		test_traceback \
+		test_unicode \
+	'; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:-}" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+	; \
+# https://github.com/docker-library/python/issues/784
+# prevent accidental usage of a system installed libpython of the same version
+	rm python; \
+	make -j "$nproc" \
+		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
+		"LDFLAGS=${LDFLAGS:--Wl},-rpath='\$\$ORIGIN/../lib'" \
+		"PROFILE_TASK=${PROFILE_TASK:-}" \
+		python \
+	; \
+	make install; \
+	\
+	cd /; \
+	rm -rf /usr/src/python; \
+	\
+	find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name 'libpython*.a' \) \) \
+			-o \( -type f -a -name 'wininst-*.exe' \) \
+		\) -exec rm -rf '{}' + \
+	; \
+	\
+	ldconfig; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	apt-mark manual $savedAptMark; \
+	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
+		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
+		| sort -u \
+		| xargs -r dpkg-query --search \
+		| cut -d: -f1 \
+		| sort -u \
+		| xargs -r apt-mark manual \
+	; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	python3 --version
+
+# make some useful symlinks that are expected to exist ("/usr/local/bin/python" and friends)
+RUN set -eux; \
+	for src in idle3 pydoc3 python3 python3-config; do \
+		dst="$(echo "$src" | tr -d 3)"; \
+		[ -s "/usr/local/bin/$src" ]; \
+		[ ! -e "/usr/local/bin/$dst" ]; \
+		ln -svT "$src" "/usr/local/bin/$dst"; \
+	done
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 23.0.1
+# https://github.com/docker-library/python/issues/365
+ENV PYTHON_SETUPTOOLS_VERSION 57.5.0
+# https://github.com/pypa/get-pip
+ENV PYTHON_GET_PIP_URL https://github.com/pypa/get-pip/raw/0d8570dc44796f4369b652222cf176b3db6ac70e/public/get-pip.py
+ENV PYTHON_GET_PIP_SHA256 96461deced5c2a487ddc65207ec5a9cffeca0d34e7af7ea1afc470ff0d746207
+
+RUN set -eux; \
+	\
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends wget; \
+	\
+	wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
+	echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum -c -; \
+	\
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	export PYTHONDONTWRITEBYTECODE=1; \
+	\
+	python get-pip.py \
+		--disable-pip-version-check \
+		--no-cache-dir \
+		--no-compile \
+		"pip==$PYTHON_PIP_VERSION" \
+		"setuptools==$PYTHON_SETUPTOOLS_VERSION" \
+	; \
+	rm -f get-pip.py; \
+	\
+	pip --version
+
+# CMD ["python3"]
+
+# Necessary as Submitty does path expansion of commands in compiling a homework,
+# and so resolves "python" -> "/usr/bin/python"
+RUN cd /usr/bin \
+	&& ln -s /usr/local/bin/python3 python3 \
+	&& ln -s /usr/local/bin/python3 python \
+	&& ln -s /usr/local/bin/pip3 pip3 \
+	&& ln -s /usr/local/bin/pip3 pip
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    wget \
+    zlib1g-dev \
+    libarchive13 \
+    libgmp10 \
+    libossp-uuid16 \
+    libssl1.1 \
+    ca-certificates \
+    libdb5.3 \
+    libpcre3 \
+    libedit2 \
+    libgeos-c1v5 \
+    unixodbc \
+    odbc-postgresql \
+    tdsodbc \
+    libmariadb3 \
+    libsqlite3-0 \
+    libserd-0-0 \
+    libraptor2-0 && \
+    rm -rf /var/lib/apt/lists/*
+
+ENV SWIPL_VER 8.0.3
+
+RUN set -eux; \
+    mkdir /tmp/src; \
+    cd /tmp/src; \
+    wget http://www.swi-prolog.org/download/stable/src/swipl-${SWIPL_VER}.tar.gz; \
+    tar -xzf swipl-${SWIPL_VER}.tar.gz; \
+    cd swipl-${SWIPL_VER}; \
+    ./configure --prefix=/usr/local && \
+    make && make install; \
+    cd / && \
+    rm -rf /tmp/src
+
+CMD ["/bin/bash"]
diff --git a/dockerfiles_to_do/phil4140/aris/Dockerfile b/dockerfiles_to_do/phil4140/aris/Dockerfile
new file mode 100644
index 0000000..f9634b1
--- /dev/null
+++ b/dockerfiles_to_do/phil4140/aris/Dockerfile
@@ -0,0 +1,70 @@
+FROM debian:stretch-slim
+
+RUN apt-get update \
+    && apt-get -y --no-install-recommends install \
+      grep \
+      libseccomp-dev \
+      libseccomp2 \
+      procps \
+    && rm -rf /var/lib/apt/lists/*
+RUN echo "deb http://ftp.debian.org/debian stretch-backports main" >> /etc/apt/sources.list \
+    && apt-get update \
+    && apt-get -y --no-install-recommends install \
+      clang-6.0 \
+    && apt-get -y install cmake\
+    && apt-get -y install make\
+    && rm -rf /var/lib/apt/lists/* \
+    && ln -s /usr/bin/clang-6.0 /usr/bin/clang \
+    && ln -s /usr/bin/clang++-6.0 /usr/bin/clang++
+
+ENV RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH=/usr/local/cargo/bin:$PATH \
+    RUST_VERSION=1.41.1
+
+RUN set -eux; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+        ca-certificates \
+        gcc \
+        libc6-dev \
+        wget \
+        ; \
+    dpkgArch="$(dpkg --print-architecture)"; \
+    case "${dpkgArch##*-}" in \
+        amd64) rustArch='x86_64-unknown-linux-gnu'; rustupSha256='ad1f8b5199b3b9e231472ed7aa08d2e5d1d539198a15c5b1e53c746aad81d27b' ;; \
+        armhf) rustArch='armv7-unknown-linux-gnueabihf'; rustupSha256='6c6c3789dabf12171c7f500e06d21d8004b5318a5083df8b0b02c0e5ef1d017b' ;; \
+        arm64) rustArch='aarch64-unknown-linux-gnu'; rustupSha256='26942c80234bac34b3c1352abbd9187d3e23b43dae3cf56a9f9c1ea8ee53076d' ;; \
+        i386) rustArch='i686-unknown-linux-gnu'; rustupSha256='27ae12bc294a34e566579deba3e066245d09b8871dc021ef45fc715dced05297' ;; \
+        *) echo >&2 "unsupported architecture: ${dpkgArch}"; exit 1 ;; \
+    esac; \
+    url="https://static.rust-lang.org/rustup/archive/1.21.1/${rustArch}/rustup-init"; \
+    wget "$url"; \
+    echo "${rustupSha256} *rustup-init" | sha256sum -c -; \
+    chmod +x rustup-init; \
+    ./rustup-init -y --no-modify-path --profile minimal --default-toolchain $RUST_VERSION; \
+    rm rustup-init; \
+    chmod -R a+w $RUSTUP_HOME $CARGO_HOME; \
+    rustup --version; \
+    cargo --version; \
+    rustc --version; \
+    apt-get remove -y --auto-remove \
+        wget \
+        ; \
+    rm -rf /var/lib/apt/lists/*;
+
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends git \
+  && rm -rf /var/lib/apt/lists/* \
+  && echo "#/bin/bash auto_grader\n/auto_grader \$1 \$2" > /auto_grader.sh \
+  && mkdir /work \
+  && cd /work \
+  && git clone https://github.com/Bram-Hub/Aris.git \
+  && cd Aris \
+  && cargo build --release --bin aris-auto-grader \
+  && cp target/release/aris-auto-grader /auto_grader \
+  && cd / \
+  && chmod -R 755 /auto_grader /auto_grader.sh \
+  && rm -r /work \
+  && apt-get purge -y --auto-remove git
+CMD ["/bin/bash"]