anchor.diff:  # Tensorflow
   # ------------------------------------------------------------------
   
  -    conda install -y \
  -        tensorflow==2.3.0 \
  -        && \
  +    # conda install -y --freeze-installed \
  +    #     tensorflow==2.3.0 \
  +    #     && \
   
   # ==================================================================
   # PyTorch
   # ------------------------------------------------------------------
   
  -    conda install -y \
  -        pytorch==1.7.1 \
  -        torchvision torchaudio cpuonly -c pytorch && \
  -    conda install -c conda-forge -y \
  -        pytorch-lightning \
  -        && \
  +    # conda install -y --freeze-installed \
  +    #     pytorch==1.7.1 \
  +    #     torchvision torchaudio cpuonly -c pytorch && \
  +    # conda install -c conda-forge -y --freeze-installed \
  +    #     pytorch-lightning \
  +    #     && \
   
  -    $PIP_INSTALL \
  -        torch_optimizer \
  -        && \
  +    # $PIP_INSTALL \
  +    #     torch_optimizer \
  +    #     && \
   
   # ==================================================================
   # OpenCV
   # ------------------------------------------------------------------
   
  -    apt-get install -y build-essential && \
  -    $GIT_CLONE --branch 4.3.0 https://github.com/opencv/opencv ~/opencv && \
  -    mkdir -p ~/opencv/build && cd ~/opencv/build && \
  -    cmake -D CMAKE_BUILD_TYPE=RELEASE \
  -          -D CMAKE_INSTALL_PREFIX=/usr/local \
  -          -D WITH_IPP=OFF \
  -          -D WITH_CUDA=OFF \
  -          -D WITH_OPENCL=OFF \
  -          -D BUILD_TESTS=OFF \
  -          -D BUILD_PERF_TESTS=OFF \
  -          -D PYTHON3_LIBRARY=/opt/conda/lib/libpython3.8.so \
  -          -D PYTHON3_INCLUDE_DIR=/opt/conda/include/python3.8 \
  -          -D PYTHON3_EXECUTABLE=/opt/conda/bin/python \
  -          -D PYTHON3_PACKAGES_PATH=/opt/conda/lib/python3.8/site-packages \
  -          .. && \
  -    make -j"$(nproc)" install && \
  -    ln -s /usr/local/include/opencv4/opencv2 /usr/local/include/opencv2 && \
  -    DEBIAN_FRONTEND=noninteractive apt-get remove -y build-essential && \
  +    # apt-get install -y build-essential && \
  +    # conda install -y --freeze-installed cmake==3.14.0 && \
  +    # $GIT_CLONE --branch 4.3.0 https://github.com/opencv/opencv ~/opencv && \
  +    # mkdir -p ~/opencv/build && cd ~/opencv/build && \
  +    # cmake -D CMAKE_BUILD_TYPE=RELEASE \
  +    #       -D CMAKE_INSTALL_PREFIX=/usr/local \
  +    #       -D WITH_IPP=OFF \
  +    #       -D WITH_CUDA=OFF \
  +    #       -D WITH_OPENCL=OFF \
  +    #       -D BUILD_TESTS=OFF \
  +    #       -D BUILD_PERF_TESTS=OFF \
  +    #       -D PYTHON3_LIBRARY=/opt/conda/lib/libpython3.8.so \
  +    #       -D PYTHON3_INCLUDE_DIR=/opt/conda/include/python3.8 \
  +    #       -D PYTHON3_EXECUTABLE=/opt/conda/bin/python \
  +    #       -D PYTHON3_PACKAGES_PATH=/opt/conda/lib/python3.8/site-packages \
  +    #       .. && \
  +    # make -j"$(nproc)" install && \
  +    # ln -s /usr/local/include/opencv4/opencv2 /usr/local/include/opencv2 && \
  +    # conda remove -y cmake && \
  +    # DEBIAN_FRONTEND=noninteractive apt-get remove -y build-essential && \
   
   # ==================================================================
   # Additional Packages
   # ------------------------------------------------------------------
   
  -    conda install -c conda-forge -y \
  -        gensim \
  -        transformers \
  -        optuna \
  -        yellowbrick \
  -        plotly \
  -        shap \
  -        gym \
  -        && \
  +    # conda install -c conda-forge -y --freeze-installed \
  +    #     gensim \
  +    #     transformers \
  +    #     optuna \
  +    #     yellowbrick \
  +    #     plotly \
  +    #     shap \
  +    #     gym \
  +    #     && \
   
  -    $PIP_INSTALL \
  -        zhconv \
  -        iterative-stratification \
  -        && \
  +    # $PIP_INSTALL \
  +    #     zhconv \
  +    #     iterative-stratification \
  +    #     && \
   
  -    # LightGBM, Xgboost
  -    conda install -c conda-forge -y lightgbm xgboost \
  -        && \
  +    # # LightGBM, Xgboost
  +    # conda install -c conda-forge -y  --freeze-installed \
  +    #     lightgbm xgboost \
  +    #     && \
   
   # ==================================================================
   # Config & Cleanup
  +# https://jcristharif.com/conda-docker-tips.html
   # ------------------------------------------------------------------
       ldconfig && \
       apt-get clean -y && \
       apt-get autoremove -y && \
  +    conda clean --all --force-pkgs-dirs -y && \
  +    find /opt/conda/ -follow -type f -name '*.a' -delete && \
  +    find /opt/conda/ -follow -type f -name '*.pyc' -delete && \
  +    find /opt/conda/ -follow -type f -name '*.js.map' -delete && \
       rm -rf /tmp/* && \
  -    rm -rf /var/cache/apk/*
  +    rm -rf /var/cache/apk/* && \
  +    find /opt/conda/lib/python3.*/ -name 'tests' -exec rm -r '{}' + && \
  +    find /opt/conda/lib/python3.*/site-packages/ -name '*.so' -print -exec sh -c 'file "{}" | grep -q "not stripped" && strip -s "{}"' \;
   
   ENV TZ=Asia/Taipei
   RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
  
positive.code: RUN APT_INSTALL="apt-get install -y --no-install-recommends" && \
      PIP_INSTALL="pip --no-cache-dir install --upgrade --default-timeout=100" && \
      GIT_CLONE="git clone --depth 10" && \
  
  # ==================================================================
  # System Packages & Tools
  
negative.code:         scikit-learn \
          matplotlib \
          seaborn \
          && \
  
      # Jupyter Notebook
      conda install -c conda-forge -y --freeze-installed \
          jupyter \
          jupyter_contrib_nbextensions \
          jupyter_nbextensions_configurator \
  