anchor.diff:  #Install Lisp: sbcl
   RUN wget http://prdownloads.sourceforge.net/sbcl/sbcl-1.2.9-x86-64-linux-binary.tar.bz2 -O /cre/sbcl.tar.bz2 && \
       mkdir /cre/sbcl && \
  -    tar jxvf /tmp/sbcl.tar.bz2 --strip-components=1 -C /cre/sbcl/ && \
  +    tar -jxvf /cre/sbcl.tar.bz2 --strip-components=1 -C /cre/sbcl/ && \
       cd /cre/sbcl && \
       sh ./install.sh && \
       cd /cre && \
  
positive.code: # Install Jupyter Notebook first
  RUN pip3 install --upgrade pip
  RUN pip3 install jupyter
  # Install Jupyter Hub second
  RUN python3 -m pip install jupyterhub
  RUN npm install -g configurable-http-proxy
  RUN python3 -m pip install notebook  # needed if running the notebook servers locally
  
  # check??
  #jupyterhub -h
  
negative.code: # https://github.com/fredokun/cl-jupyter/blob/master/about-cl-jupyter.ipynb
  #
  # https://irkernel.github.io/
  #
  # https://jupyterlab.readthedocs.io/en/stable/user/jupyterhub.html
  # https://nbconvert.readthedocs.io/en/latest/install.html#installing-nbconvert
  
  # Jupyter Hub Dockerfile 
  #
  