anchor.diff:      mkdir -p /home/app/tmp/vendor/bundle && \
       chown -R app:app /home/app/tmp/vendor/bundle && \
       chmod -R 755 /home/app/tmp/vendor/bundle && \
  -    sudo -u app bundle install --path vendor/bundle
  +    /sbin/setuser app bundle install --path vendor/bundle
   
   # Copy webapp folder
   ADD . /home/app/webapp
  
positive.code: 
  # Install npm and bower packages
  WORKDIR /home/app/tmp/vendor
  RUN sudo -u app npm install && \
      npm install -g phantomjs-prebuilt
  
  # Install Ruby gems
  
negative.code: FROM phusion/passenger-full:0.9.19
  MAINTAINER Martin Fenner "mfenner@datacite.org"
  
  # Set correct environment variables
  