anchor.diff:  
   RUN pip install --no-cache-dir \
         notebook==5.1.0 \
  -      git+https://github.com/jupyterhub/jupyterhub@0.8.0rc2 \
  +      jupyterhub==0.8.1 \
         ipywidgets==6.0.0 \
         jupyterlab==0.26.5
   
  
positive.code: 	    openjdk-8-jdk-headless \
  	    && \
      apt-get purge && apt-get clean
      
  RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && \
      locale-gen
  
  
negative.code: RUN pip install --no-cache-dir nbgitpuller==0.3 && \
  	jupyter serverextension enable  --sys-prefix --py nbgitpuller
  
  # gmaps notebook extension
  # for ls 88-4, economic development connector
  RUN pip install --no-cache-dir gmaps && \
    jupyter nbextension enable --py --sys-prefix gmaps
  