anchor.diff:  RUN wget https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz
   RUN tar zxvf steamcmd_linux.tar.gz
   
  -
  -ADD ./start.sh /start.sh
  -RUN chmod 755 /start.sh
   ENTRYPOINT ["/start.sh"]
  
positive.code: FROM debian:jessie
  MAINTAINER Josh Cox <josh 'at' webhosting coop>
  
  ENV STEAMER_UPDATED 20150513
  # override these variables in your Dockerfile
  
negative.code: ADD ./run.sh /run.sh
  RUN chmod 755 /run.sh
  
  ADD ./start.sh /start.sh
  RUN chmod 755 /start.sh
  
  RUN useradd -m -s /bin/bash steam
  RUN usermod -a -G video,audio steam
  