Geo: Fix Registry configuration guide
What does this MR do and why?
We recently improved this guide for GitLab HA but we made it confusing for non-HA setups. See 3828c290 to see the change, and the example of confusion gitlab-environment-toolkit#670 (comment 1394541510)
This change adds some more explanation and makes it clear for both worlds.
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Edited by Valery Sizov