I will use that for documenting further stuff. If Zabbix works a few screenshots from there should explain a lot but everything else I would add to the wiki.

This looks great! I will try Zabbix first! More than I expected. Thank you

That sounds to complicate for me. I am still a beginner.

Hmmm, I have a few dockers, but most stuff is running in lxc‘s (Proxmox). Btw: I tried Heimdall (or Homar?) but I had to enter all services by hand. Is there a way or an app to automate that?