Consider pg_dump command

[jhnath90]

I just ran into this issue when I was trying to dump a database locally. Maybe we should consider adding a nib command wrapper around docker exec <container_name> pg_dump -U <user> <schema_name>

[blankenshipz]

Josh Hnath (@jhnath90) John Allen (@johnallen3d) Perhaps a plugin would be the right place to put this functionality? Something like nib-pg that has a sub-command for dump?