anchor.diff:  # Configure local files last.
   COPY start-notebook.sh /usr/local/bin/
   COPY jupyter_notebook_config.py static/custom /home/$NB_USER/.jupyter/
  -COPY notebooks/ /home/$NB_USER/
  +COPY notebooks/ /home/$NB_USER/notebooks/
   RUN chown -R $NB_USER:users /home/$NB_USER
  
positive.code: 
  ENV NB_USER=jovyan NB_UID=1001
  RUN useradd -m -s /bin/bash -N -u $NB_UID $NB_USER && \
      mkdir /home/$NB_USER/.jupyter && \
      mkdir /home/$NB_USER/.jupyter/custom && \
      chown -R $NB_USER:users /home/$NB_USER
  
negative.code:     chmod +x /usr/local/bin/tini
  
  # Regent kernel configuration files.
  RUN mkdir /usr/local/lib/python3.4/dist-packages/notebook/static/components/codemirror/mode/regent
  COPY codemirror/regent/regent.js /usr/local/lib/python3.4/dist-packages/notebook/static/components/codemirror/mode/regent/
  
  RUN mkdir -p /usr/local/share/jupyter/kernels/regent
  COPY kernels/regent/kernel_plain.json /usr/local/share/jupyter/kernels/regent/kernel.json
  