anchor.diff:  
   # prepare for bashing
   
  -WORKDIR "$setup_home"
  -
   CMD /usr/bin/sudo -u "$setup_user" "$setup_home/.start.sh"
positive.code: # update the system
  
  RUN apt-get -qq update && \
      apt-get -qq -y install sudo && \
      apt-get -qq autoremove && \
      apt-get -qq clean
  
  
negative.code: ADD setup-zen setup
  ADD docker-home .
  
  # create volumes
  
  VOLUME "$setup_home/cp-local-development"
  
  # after the file system is intialized, we own it!
  
  RUN chown -R "$setup_user:$setup_user" "$setup_home"
  
  # install
  
  