anchor.diff:  # install packages
   RUN apt-get install -y nodejs git xvfb build-essential git
   
  -# configure video loopback
  -RUN /tmp/setup-loopbackvideo.sh
  +# TODO: configure video loopback
  +# RUN /tmp/setup-loopbackvideo.sh
   
   # create the testbot user
   RUN useradd -p testbot testbot
  
positive.code: RUN chown testbot /home/testbot
  
  # install chrome
  ENV CHROME_VERSION stable
  RUN /tmp/install-chrome.sh
  
negative.code: FROM ubuntu:14.04
  MAINTAINER Damon Oehlman <damon.oehlman@nicta.com.au>
  
  # configure environment
  ENV DISPLAY :99.0
  ENV CHROME_DEB google-chrome-stable_current_amd64.deb
  
  # use aarnet mirror for quicker building while developing
  RUN sed -i 's/archive.ubuntu.com/mirror.aarnet.edu.au\/pub\/ubuntu\/archive/g' /etc/apt/sources.list
  