anchor.diff:  FROM debian:buster
   LABEL maintainer="joelnbarnham@gmail.com"
  +
  +COPY nginx/Gemfile /opt/gollum/
  +WORKDIR /opt/gollum/
   
   RUN \
   	export DEBIAN_FRONTEND=noninteractive && \
  
positive.code: 	:
  
  USER gollum
  CMD ["gollum", "--mathjax", "--port", "4567", "--css"]
  
negative.code: 		python \
  		python-pip \
  		ruby \
  		ruby-bundler \
  		ruby-dev \
  		zlib1g-dev \
  	&& \
  	bundle install && \
  	pip install docutils && \
  	apt-get -y remove \
  		build-essential \
  