feat(uptime-kuma): use PUID/PGID & protect with authelia by default

[JigSawFr]

How Has This Been Tested?

• [x] App secured by Authelia SSO authentication system.
• [x] Custom UID/GID is set to the container to run under Saltbox user.

[owine]

Are we sure we don’t need to reset permissions recursively? If an existing setup has files owned by root it would likely break.