Setting up xterm.js for Proxmox
xterm.js is a more flexible terminal in Proxmox than the defacto noVNC setting. To set it up. Do the following:
Add a virtual serial port to the VM
Enable and start the virtual serial port in the VM
sudo systemctl enable serial-getty@ttyS0.service
sudo systemctl start serial-getty@ttyS0.service
Shut down the VM
Restart the VM