anchor.diff:  RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
   
   # Add non-root user.
  -RUN useradd -m -s /bin/bash dev 
  +RUN useradd -m -s /bin/bash dev
   RUN echo dev:nexus | chpasswd
   
   # Install most of the environment under the non-root user
  
positive.code:     mkdir ~/.virtualenvs && \
      echo "export WORKON_HOME=\$WORKON_HOME" >> ~/.bashrc && \
      echo "source /usr/local/bin/virtualenvwrapper.sh" >> ~/.bashrc && \
      echo "export PIP_VIRTUALENV_BASE=\$WORKON_HOME" >> ~/.bashrc 
  
  # IPFS
  RUN echo "export PATH=\$GOPATH/bin:\$PATH:" >> ~/.bashrc && \
  
negative.code: # Switch back to root so we can run our daemons
  USER root
  
  # Add user to sudoers
  RUN adduser dev sudo
  
  # chown/chgrp dev's .ssh directory
  RUN mkdir /home/dev/.ssh && chown -R dev /home/dev/.ssh && chgrp -R dev /home/dev/.ssh
  
  # Enable SSH
  RUN rm -f /etc/service/sshd/down
  
  # Expose ports and set up daemon script
  EXPOSE 20 21 22 4001 5001 8000 8080 8545 30000 30001 30002 30003 30004 30005 30006 30007 30008 30009 30303
  
  ADD ./start.sh /start.sh
  