anchor.diff:  # install packages
   RUN apt-get install -y nodejs git xvfb build-essential git
   
  -# install chrome
  -RUN /tmp/install-chrome.sh
  -
   # configure video loopback
   RUN /tmp/setup-loopbackvideo.sh
   
  
positive.code: FROM ubuntu:14.04
  MAINTAINER Damon Oehlman <damon.oehlman@nicta.com.au>
  
  # initialise a few environment variables
  ENV CHROME_VERSION stable
  
  # add resources
  ADD ./resource/scripts/ /tmp/
  
  # install wget and curl
  RUN apt-get -y update
  
negative.code: RUN useradd -p testbot testbot
  RUN mkdir -p /home/testbot
  RUN chown testbot /home/testbot
  
  # install chrome
  ENV CHROME_VERSION stable
  RUN /tmp/install-chrome.sh
  