anchor.diff:  # Set some config
   ENV RAILS_LOG_TO_STDOUT true
   
  -# throw errors if Gemfile has been modified since Gemfile.lock
  -RUN bundle config --global frozen 1
  -
   # Workdir
   RUN mkdir -p /home/app
   WORKDIR /home/app
  -
  -# Save timestamp of image building
  -RUN date -u > BUILD_TIME
   
   # Install gems
   ADD Gemfile* /home/app/
  
positive.code: # Precompile assets
  RUN RAILS_ENV=production bundle exec rake assets:precompile --trace
  
  # Start up
  CMD "docker/startup.sh"
  
negative.code: FROM ledermann/base
  
  # Add the nginx site and config
  RUN rm -rf /etc/nginx/sites-available/default
  ADD docker/nginx.conf /etc/nginx/nginx.conf
  EXPOSE 80 443
  
  # Install wkhtmltopdf
  RUN apt-get update && apt-get install -y libxrender1 libxext6 fonts-lato --no-install-recommends && \
  