name the container?

[d]

This might enable two use cases:

1. Getting another shell in the container by docker exec -ti <name> /bin/bash
2. Running psql directly against the database with something like

   docker run --rm -ti --link <name>:gpdb postgres psql -h gpdb -p 15432 -U gpadmin -d postgres

   or

   docker run --rm -ti --net container:<name> postgres psql -h localhost -p 15432 -U gpadmin -d postgres