Merge pull request #1 from agonzalezro/psql-x

Format and hide Ports if there are none

Signed-off-by: Eloy Coto <eloy.coto@gmail.com>
Signed-off-by: Eloy Coto <eloy.coto@gmail.com>
Merge branch 'master' of https://github.com/eloycoto/docker