anchor.diff:  # # Add VOLUMEs to allow backup of config, logs and databases
   # VOLUME  ["/etc/postgresql", "/var/log/postgresql", "/var/lib/postgresql"]
   
  -# Start postgres when starting a container
  +# Start postgres when starting the container
   CMD ["/usr/lib/postgresql/13/bin/postgres", "-D", "/var/lib/postgresql/13/main", "-c", "config_file=/etc/postgresql/13/main/postgresql.conf"]
  
positive.code: # FROM python:3.9-slim-buster
  FROM debian:buster-slim
  
  # Postgres user password - WARNING: change this to something more secure
  ARG pg_password="password"
  ENV PGPASSWORD=${pg_password}
  
  
negative.code:     && apt-get autoremove -y --purge \
      && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  # start Postgres server and set the default user password
  RUN /etc/init.d/postgresql start \
      && sudo -u postgres psql -c "ALTER USER postgres PASSWORD '${pg_password}';" \
      && sudo -u postgres psql -c "CREATE EXTENSION postgis;"
  