Remove/rewrite Deploying from Dockerhub page

[mhauru]

The tutorial has the page for how to deploy the whole GrimoireLab complex using a single Docker container: https://github.com/chaoss/grimoirelab-tutorial/blob/master/basics/dockerhub.md

The page links to the grimoirelab/full image which is over 4 years old, and some of the instructions around it also seem to be specific to the old version or otherwise out of date (is credentials.cfg still a thing?). Maybe the page needs a rewrite, or in the meanwhile just a removal, so that it doesn't mislead new comers to use a very old version?

EDIT: The same may apply to the SirMordred in a container page, which also references the old containers.