anchor.diff:  
   # Expose web
   EXPOSE 80
  +
  
positive.code: # Enable the memcached service
  RUN rm -f /etc/service/memcached/down
  
  # Prepare tmp folder for installation of Ruby gems and npm modules
  RUN mkdir -p /home/app/tmp
  COPY vendor /home/app/tmp/vendor
  
negative.code:     chmod -R 755 /home/app/tmp/vendor/bundle && \
      sudo -u app bundle install --path vendor/bundle
  
  # Copy webapp folder
  ADD . /home/app/webapp
  WORKDIR /home/app/webapp
  