anchor.diff:  # Add bundler config to use `/data/vendor/bundle` as the gem install path
   RUN mkdir ~/.bundle && \
   	echo -e "BUNDLE_DISABLE_LOCAL_BRANCH_CHECK: 'true'\nBUNDLE_PATH: vendor/bundle\nBUNDLE_DISABLE_SHARED_GEMS: 'true'\n" > ~/.bundle/config
  -RUN gem install bundler
   
   # Switch back to root for initialisation
   # we `su` to developer manually
  
positive.code: # Set up development environment configuration
  ##
  
  # Add unprivileged user to run as
  RUN useradd -m developer
  USER developer
  
negative.code: FROM fedora:latest
  MAINTAINER alex@alexblackie.com
  
  ARG RUBY_MAJOR=2.3
  ARG RUBY_MINOR=1
  