Add a trouble shooting guide to the Wiki/Docs
Created by: riyad
It would be nice to be guided through a standardized trouble shooting process, especially because there are so many separate parts that need to be working together in order to have GitLab running. Especially for parts that yield notoriously unhelpful/general error messages (e.g. Gitolite about SSH or GitLab about Gitolite)
What I was thinking of was to have a few steps/commands separately documented for each component (e.g. SSH, Gitolite, MySQL, Redis, GitLab) to check if it is working at all and working in concert with the components it is supposed to work with.
There could also be a "common errors/pitfalls" section. This could be started by collecting previous bug reports and their solutions.