Okay update! I went with draw.io AND PlantUML, which i found when investigating Mermaid :) I think i need to work more with my PlantUML diagram because i have more than 50 containers :S and that is what i need to list and go thru.
So on my Elitedesk i have installed Proxmox which is detailed on the second picture.





Found this in the latest selfhosted newsletter: https://github.com/mayanayza/netvisor
Gonna check that out aswell