Replace Watchtower by Arcane

[Antiz96]

• https://github.com/Antiz96/Linux-Server/blob/main/Services/Arcane-Server.md
• https://github.com/Antiz96/Linux-Server/blob/main/Services/Arcane-Agent.md

[Antiz96]

From an automation / ansible point of view, we're good to go here.

However, there is one last upstream issue that should ideally be addressed before merging this.
It seems like Arcane is not able to self update. Making an API call to update containers when there's an available update for Arcane agents (for instance) results in it just killing itself (see getarcaneapp/arcane#1267 (comment)).

Let's wait to see if this can be figured out or worked around.

[Antiz96]

It seems like Arcane is not able to self update. Making an API call to update containers when there's an available update for Arcane agents (for instance) results in it just killing itself (see getarcaneapp/arcane#1267 (comment)).

Self update only doesn't work on agents but works fine for the server. I opened an upstream issue at getarcaneapp/arcane#1559.