The firmware update is done in just a few minutes. Connect the Conbee II to your PC, install the deCONZ software, download the latest firmware and use the command line tool to flash it.
deCONZ: http://deconz.dresden-elektronik.de/ubuntu/stable/
Firmware: http://deconz.dresden-elektronik.de/deconz-firmware/
You can install Home Assistant (HA) as LXC or VM on Proxmox. Or even put HA as docker container on top of a LXC or VM, but passing through hardware (like ConBee II) will become much more complicated. There a many installation guides i.e.
https://community.home-assistant.io/t/installing-home-assistant-using-proxmox/201835
https://www.x33u.org/docs/server/home-assistant_proxmox-vm/
https://www.juanmtech.com/install-proxmox-and-virtualize-home-assistant/
and there are few scripts which automate the installing process. Unfortunately some of them doesn’t work anymore for PVE 7 i.e.
https://github.com/whiskerz007/proxmox_hassio_lxc
https://github.com/whiskerz007/proxmox_hassos_install/
The only script that is working (while writing this) is this one https://github.com/tteck/proxmox_haos_vm which is possibly a fork from the previous script from whiskerz007.
