Quake has low spec requirements. The following should be fine:

• Memory: 2 GB
• Disk Space: 2 GB. This includes the Ubuntu OS.
• Cores: 2

1. Prepare the Machine
2. Setup a Local QuakeJS Server
3. Setup a Local Content Server
4. Create a QuakeJS service

https://steamforge.net/wiki/index.php/How_to_setup_a_local_QuakeJS_server_under_Debian_9_or_Debian_10

https://github.com/treyyoder/quakejs-docker