Server documentation reviews

[Peter Boy]

Hi,

I’ve added some new articles to our server documentation:
* 12 Containerization overview (new)
* 13 Container nspawn installation (new)
* 15 PostgreSQL Installation (new)

These are looking for a review.

And we still need a review for:
* 06	Virtualization

See details at https://pagure.io/fedora-server/issue/69

Would be nice to complete the reviews soon.

Would be really a waste of energy if we would have release 36 out of the door before we have a review for the release 35 updates.

Peter