Container Registry admin docs need clarification
Problem to solve
The way the documentation is written it seems like you need to do the first part "Enable the Container Registry" in any case and then do e.g. "Configure Container Registry under an existing GitLab domain."
Would be nice if you could make it a bit more obvious at the top of the page.
Proposal
Make it clear that you don't need to configure anything in Omnibus if you want to use the Container Registry right away.
https://docs.gitlab.com/ee/administration/packages/container_registry.html#configure-container-registry-under-an-existing-gitlab-domain should better mention that it's there to guide you how to change the default port.
Other links/references
https://docs.gitlab.com/ee/administration/packages/container_registry.html#comment-4786982987