Merge pull request #27 from EdCaunt/dockerfile

docker: added dockerfile for reproducibility

docker/README.md

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+# Dockerfile for running Schism
+
+To aid the reproducibility of work carried out with Schism, alongside its wider usage, this directory contains a Dockerfile which can be used to run the code. With this, both tests and examples can be run.
+
+# Building and running the image
+
+To build the image, one must navigate to the main directory (that above this one) and run the following command:
+
+`docker build --network=host --file docker/dockerfile --tag schism .`.
+
+To run a bash shell inside the image, use:
+
+`docker run -i -t schism /bin/bash`.
+
+Note that these commands may require `sudo`. Once inside the image, one will want to activate the `venv` created, using:
+
+`source venv/bin/activate`.
+
+From here, one can run the tests and examples, found in `app/schism`.

docker/dockerfile

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+##########################################################
+# This Dockerfile can be used to run the Schism examples #
+##########################################################
+
+# Base image with compilers
+ARG base=devitocodes/bases:cpu-gcc
+
+FROM $base as builder
+
+# Copy Schism
+ADD . /app/schism
+
+# Install pip dependencies
+RUN python3 -m venv /venv && \
+    /venv/bin/pip install --no-cache-dir --upgrade pip && \
+    /venv/bin/pip install --no-cache-dir jupyter && \
+    /venv/bin/pip install --no-cache-dir wheel && \
+    /venv/bin/pip install -r /app/schism/requirements.txt
+
+# Upgrade python in venv
+RUN python3 -m venv --upgrade /venv
+
+# Install Schism as a pip package
+WORKDIR /app/schism
+RUN /venv/bin/pip install --no-cache-dir -e . && \
+    rm -rf ~/.cache/pip
+
+WORKDIR /~
+# Safety cleanup
+RUN apt-get clean && apt-get autoclean && apt-get autoremove && \
+    rm -rf /var/lib/apt/lists/*
+
+FROM $base as user
+
+# Create app user
+# Set the home directory as out app user's home
+ENV HOME=/app
+ENV APP_HOME=/app
+
+RUN mkdir -p /app && groupadd -r app && \
+    useradd -r -g app -d /app -s /sbin/nologin -c "Docker image user" app && \
+    chown -R app:app $APP_HOME
+
+COPY --from=builder --chown=app:app /app /app
+
+# Venv
+COPY --from=builder --chown=app:app /venv /venv
+
+# Change to the app user
+USER app
+
+EXPOSE 8888