anchor.diff:  # Install all OS dependencies for fully functional notebook server
   ENV DEBIAN_FRONTEND noninteractive
   RUN apt-get update && apt-get install -yq --no-install-recommends \
  -    git nano \
  -    wget \
  -    build-essential \
  -    python-dev \
  +    git nano wget \
  +    build-essential python-dev \
       ca-certificates \
  -    bzip2 \
  -    unzip \
  +    bzip2 unzip \
       libsm6 \
  -    texlive-latex-base \
  -    texlive-latex-extra \
  -    texlive-fonts-extra \
  -    texlive-fonts-recommended \
  +    texlive-latex-base texlive-latex-extra \
  +    texlive-fonts-extra texlive-fonts-recommended \
       texlive-generic-recommended \
       sudo \
       locales \
  
positive.code: 
  WORKDIR /root/work
  
  # Add Tini
  ENV TINI_VERSION v0.9.0
  ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /tini
  ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini.asc /tini.asc
  RUN gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 0527A9B7 && \
      gpg --verify /tini.asc
  RUN chmod +x /tini
  ENTRYPOINT ["/tini", "--"]
  
  CMD ["/opt/conda/bin/jupyter", "notebook", "--ip=0.0.0.0", "--port=8888:8888", "--no-browser" "--notebook-dir='/root/work'", "&"]
  
negative.code:     terminado \
      && conda clean -tipsy
  
  # Add Tini
  ENV TINI_VERSION v0.9.0
  ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /tini
  ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini.asc /tini.asc
  RUN gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 0527A9B7 && \
      gpg --verify /tini.asc
  RUN chmod +x /tini
  
  # Install JupyterHub: https://github.com/jupyterhub/jupyterhub
  # JupyterHub is a multi-user server for Jupyter
  
  # configure virtual environments
  RUN ln -snf /bin/bash /bin/sh
  RUN pip install virtualenv && \
      pip3 install virtualenv
  
  RUN virtualenv -p /usr/bin/python2 venv27 && \
      source venv27/bin/activate && \
      pip install notebook ipykernel requests && \
      ipython kernelspec install-self && \
      deactivate
  
  RUN virtualenv -p /usr/bin/python3 venv35 && \
      source venv35/bin/activate && \
      pip3 install notebook ipykernel requests && \
      ipython3 kernelspec install-self && \
      deactivate
  
  RUN conda install --yes anaconda
  RUN npm install -g configurable-http-proxy && \
      pip3 install jupyterhub && \
      pip3 install jupyter && \
      mkdir -p /etc/jupyterhub && \
  