Dynamic network configuration for Proxmox nodes
Currently network configuration is hardcoded and we need to reboot the node in case of network changes. That's because the "apply configuration" of Proxmox depends on ifupdown2 and the version in buster repos is not supported by Proxmox.
We need the version from their own repository if we want to do that. But our IPs are allocated to projects and do not change so we don't need it (this issue is not a problem but a documentation note)