Clarify what content should go in these docs
Currently the content that is supposed to go here is described in our read me as follows:
What goes here
Any content used for debugging self-hosted GitLab instances.
What DOESN'T go here
Any content that describes how to use the software. This content goes in the docs of the appropriate repository (such as GitLab CE, EE, Omnibus, or GitLab Runner).
But some of the content not related to the project such as git or even debugging linux could be added to our docs, as suggested by @dblessing in https://gitlab.slack.com/messages/CC9Q170P4/convo/CC9Q170P4-1536774016.000100/
Edited by Cindy Pallares 🦉