anchor.diff:  
   VOLUME /var/lib/docker
   VOLUME /opt/buildAgent
  -VOLUME /data
   
   
  -EXPOSE 9090
  +EXPOSE 9090
positive.code: 
  RUN apt-get update \
  	&& apt-get install -y --no-install-recommends \
  		lxc iptables aufs-tools ca-certificates curl wget software-properties-common \
  	&& rm -rf /var/lib/apt/lists/*
  
  # grab gosu for easy step-down from root
  RUN gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4
  
negative.code:   	&& update-ca-certificates
  
  # Install docker
  RUN wget -O /usr/local/bin/docker https://get.docker.com/builds/Linux/x86_64/docker-1.9.1 && chmod +x /usr/local/bin/docker
  
  RUN groupadd docker && adduser --disabled-password --gecos "" teamcity \
  	&& sed -i -e "s/%sudo.*$/%sudo ALL=(ALL:ALL) NOPASSWD:ALL/" /etc/sudoers \
  	&& usermod -a -G docker,sudo teamcity
  
  # Install ruby and node.js build repositories
  RUN apt-add-repository ppa:chris-lea/node.js \
  