Following are configuration files and instructions for using systemd to create Unix domain sockets to handle incoming websocket requests. Websocket requests are proxied by nginx.
While these instructions are for Debian 10, they should largely work on other Linux distributions. It may be necessary to change paths and the nginx username, which is www-data when installed with the Debian package manager.
user@host:~$ sudo apt update
user@host:~$ sudo apt install nginx python3 wget