anchor.diff:  # Source: https://github.com/nginxinc/docker-nginx/blob/master/stable/jessie/Dockerfile
   ENV NGINX_VERSION 1.10.2-1~jessie
   RUN apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys 573BFD6B3D8FBC641079A6ABABF5BD827BD9BF62 \
  -	&& echo "deb http://nginx.org/packages/debian/ jessie nginx" >> /etc/apt/sources.list \
  -	&& apt-get update \
  -	&& apt-get install --no-install-recommends --no-install-suggests -y \
  -						ca-certificates \
  -						nginx=${NGINX_VERSION} \
  -						nginx-module-xslt \
  -						nginx-module-geoip \
  -						nginx-module-image-filter \
  -						nginx-module-perl \
  -						nginx-module-njs \
  -						gettext-base \
  -	&& rm -rf /var/lib/apt/lists/*
  +  && echo "deb http://nginx.org/packages/debian/ jessie nginx" >> /etc/apt/sources.list \
  +  && apt-get update \
  +  && apt-get install --no-install-recommends --no-install-suggests -y \
  +            ca-certificates \
  +            nginx=${NGINX_VERSION} \
  +            nginx-module-xslt \
  +            nginx-module-geoip \
  +            nginx-module-image-filter \
  +            nginx-module-perl \
  +            nginx-module-njs \
  +            gettext-base \
  +  && rm -rf /var/lib/apt/lists/*
  +
  +# 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 Node.js
   # Source: https://github.com/nodejs/docker-node/blob/master/6.9/wheezy/Dockerfile
  
positive.code: # Precompile assets
  RUN RAILS_ENV=production bundle exec rake assets:precompile --trace
  
  # Save timestamp of image building
  RUN date -u > BUILD_TIME
  
  # Start up
  CMD "docker/startup.sh"
  
negative.code: FROM ruby:2.3.3
  
  # Set time zone
  ENV TZ=Europe/Berlin
  
  # Save timestamp of image building
  RUN date -u > BUILD_TIME
  
  # Install MySQL client
  # Source: http://dev.mysql.com/doc/mysql-apt-repo-quick-guide/en/#repo-qg-apt-repo-manual-setup
  