Gitlab pages administration documentation is confusing

The documentation at https://docs.gitlab.com/ee/pages/administration.html#nginx-configuration can be hard to follow. Most section cover two possible installation methods, one for source and one for omnibus making the page very busy. Additionally the NGINX caveats section only covers source installation.

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Zendesk ticket: https://gitlab.zendesk.com/agent/tickets/53017

It mentions “source” and “omnibus” caveats … but isn’t very clear if it includes ALL of the steps.

Would be a lot more helpful to have separate pages for source installs vs. omnibus

Related: https://gitlab.com/gitlab-org/gitlab-ee/issues/461

/cc @axil

changed milestone to %8.16

@cmattrex since Pages is coming in CE for 8.16 and you work on a video, let's work on refactoring the docs as well.

mentioned in issue #461 (closed)

Closing in favor of https://gitlab.com/gitlab-org/gitlab-ee/issues/461

closed