added dockerfile

Dockerfile

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+FROM ubuntu:18.04
+ENV TERM linux
+ENV DEBIAN_FRONTEND noninteractive
+# Basic apt update
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends locales ca-certificates &&  rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get -y install sudo
+
+# make sure cmake is v12.0
+RUN sudo apt -y install g++ wget make
+ADD https://cmake.org/files/v3.14/cmake-3.14.1-Linux-x86_64.sh /cmake-3.14.1-Linux-x86_64.sh
+RUN mkdir /opt/cmake
+RUN sh /cmake-3.14.1-Linux-x86_64.sh --prefix=/opt/cmake --skip-license
+RUN ln -s /opt/cmake/bin/cmake /usr/local/bin/cmake
+RUN cmake --version
+
+# Install dependencies
+RUN sudo apt update && sudo apt -y install gcc-arm-none-eabi \
+      gcc \
+      g++ \
+      git \
+      gdb-multiarch \
+      automake \
+      autoconf \
+      build-essential \
+      texinfo \
+      libtool \
+      libftdi-dev \
+      wget \
+      libusb-1.0-0-dev \
+      python3 && \
+      mkdir pico
+
+# copy required files into docker image
+COPY pico-sdk pico/pico-sdk
+COPY CMakeLists.txt pico/CMakeLists.txt
+COPY micro_speech pico/micro_speech
+COPY pico_sdk_import.cmake pico/pico_sdk_import.cmake
+
+#setup pico-sdk
+RUN OUTDIR="$(pwd)pico" && \
+      export PICO_SDK_PATH="$OUTDIR/pico-sdk" && \
+      cd $PICO_SDK_PATH && \
+      echo "Adding PICO_SDK_PATH to ~/.bashrc" && \
+      echo "export PICO_SDK_PATH=$PICO_SDK_PATH" >> ~/.bashrc
+
+# now build the model
+RUN OUTDIR="$(pwd)pico" && \
+      export PICO_SDK_PATH="$OUTDIR/pico-sdk" && \
+      cd pico && mkdir build && \
+      cd build && cmake .. && \
+      make micro_speech -j8