anchor.diff: -FROM sameersbn/ubuntu:14.04.20170123
  -MAINTAINER sameer@damagehead.com
  +FROM ubuntu:xenial-20180525
  +LABEL maintainer="sameer@damagehead.com"
   
  -ENV PG_APP_HOME="/etc/docker-postgresql"\
  +ENV PG_APP_HOME="/etc/docker-postgresql" \
       PG_VERSION=9.6 \
       PG_USER=postgres \
       PG_HOME=/var/lib/postgresql \
  
positive.code: ENV PG_BINDIR=/usr/lib/postgresql/${PG_VERSION}/bin \
      PG_DATADIR=${PG_HOME}/${PG_VERSION}/main
  
  RUN wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
   && echo 'deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main' > /etc/apt/sources.list.d/pgdg.list \
   && apt-get update \
   && DEBIAN_FRONTEND=noninteractive apt-get install -y acl \
        postgresql-${PG_VERSION} postgresql-client-${PG_VERSION} postgresql-contrib-${PG_VERSION} \
   && ln -sf ${PG_DATADIR}/postgresql.conf /etc/postgresql/${PG_VERSION}/main/postgresql.conf \
   && ln -sf ${PG_DATADIR}/pg_hba.conf /etc/postgresql/${PG_VERSION}/main/pg_hba.conf \
  
negative.code: RUN chmod 755 /sbin/entrypoint.sh
  
  EXPOSE 5432/tcp
  WORKDIR ${PG_HOME}
  ENTRYPOINT ["/sbin/entrypoint.sh"]
  