anchor.diff:  # Resolution and color depth of simulated display
   ENV RESOLUTION 1280x1024x16
   
  -WORKDIR /home/${X11_USER} 
  -VOLUME /home/${X11_USER}
  +VOLUME /home
   EXPOSE 5900
   
   # Start x11vnc
  
positive.code: FROM ubuntu:14.04
  MAINTAINER Stefan Schwetschke "stefan@schwetschke.de"
  
  ENV REFRESHED_APT_AT 2015-01-15
  
  RUN apt-get update -y
  RUN apt-get upgrade -y
  
  # Set locale to UTF-8 to fix the locale warnings
  RUN localedef -v -c -i en_US -f UTF-8 en_US.UTF-8 || :
  
negative.code: ENV DEBIAN_FRONTEND noninteractive
  
  # Installing the environment required: xserver, xdm, flux box, roc-filer and ssh
  # and install some basic packages
  # and clean up apt-get
  
  RUN apt-get update -y && \
  	apt-get upgrade -y && \
  	apt-get install -y lxde-core lxterminal xvfb x11vnc sudo && \
  	apt-get install -y firefox xterm && \
  	apt-get clean
  
  # Fix problems with Upstart and DBus inside a docker container.
  RUN dpkg-divert --local --rename --add /sbin/initctl && ln -sf /bin/true /sbin/initctl
  
  # Copy the files into the container
  ADD . /x11-src
  RUN chmod -R a=rX /x11-src
  
  # Local user, may be overwritten by dependent build
  ENV X11_USER xclient
  