anchor.diff:  USER postgres
   
   RUN /etc/init.d/postgresql start &&\
  -  psql --command "ALTER USER postgres WITH PASSWORD 'password';" &&\
  +  psql --command "ALTER USER postgres WITH PASSWORD '$PASSWORD';" &&\
     /etc/init.d/postgresql stop
   
   CMD ["/usr/lib/postgresql/9.3/bin/postgres", "-D", "/var/lib/postgresql/9.3/main", "-c", "config_file=/etc/postgresql/9.3/main/postgresql.conf"]
  
positive.code: # Install Postgres 9.3, PL/Python, PL/V8
  RUN apt-get install -y postgresql-9.3 postgresql-contrib-9.3 postgresql-server-dev-9.3 postgresql-plpython-9.3 postgresql-9.3-plv8
  
  # Clean up APT when done
  RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  ADD ./pg_hba.conf     /etc/postgresql/9.3/main/
  
negative.code: 
  # Ignore APT warnings about not having a TTY
  ENV DEBIAN_FRONTEND noninteractive
  ENV USERNAME postgres
  ENV PASSWORD password
  
  # Ensure UTF-8 locale
  RUN echo "LANG=\"en_US.UTF-8\"" > /etc/default/locale
  