[wak327]

Fixes #1433

The requirements reference doesn't say which ports MicroCloud uses, so users can run into port conflicts, for example with the Ceph dashboard, without knowing why.

This adds a "Network ports" section under "Networking requirements" listing the ports from service/service_handler.go:

Port	Protocol	Used by
6443	TCP	MicroOVN
7443	TCP	MicroCeph
8443	TCP	LXD (API and UI)
9443	TCP	MicroCloud
9444	UDP	MicroCloud multicast discovery

It also explains that the TCP ports must be reachable between all cluster members, while 9444 only needs to be reachable on the initiator when using multicast discovery. For the additional ports used by Ceph and OVN, it links to the MicroCeph and MicroOVN documentation.

Checklist

• I have read the contributing guidelines and attest that all commits in this PR are signed off, cryptographically signed, and follow this project's commit structure.
• I have checked and added or updated relevant documentation.

[wak327]

@roosterfish @elijahgreenstein a small docs addition, could you take a look when you have a moment?

[elijahgreenstein]

@wak327 thank you for this docs update. A few thoughts on adding some cross references to relevant docs pages.

[wak327]

@roosterfish I addressed @elijahgreenstein's review: the ports section now links to the MicroCeph and MicroOVN docs for their additional ports, and the Ceph dashboard note points to the Ceph documentation instead of giving a command. Could you take a look?

[wak327]

@roosterfish @elijahgreenstein I applied the latest suggestions. Could you take another look?

[roosterfish]

Thanks for your contribution, please see my comments.

[wak327]

@roosterfish thanks for the review, I've addressed your comments. Could you take another look?

[wak327]

@elijahgreenstein @roosterfish I applied the latest suggestions. Could you take another look?