Create secure websocket server in local machine

I'm trying to use a local websocket server in order to communicate between PWA and windows app. My problem is that pwa requires secure connections and it won't work with a regular websocket server.

So my problem is mainly. How do I certificate my machine so it can be used with pwa?

I'm using websocket sharp to create websocket server and I don't know how to initialize it as secure server

Copyright Notice：Content Author:「Ben」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/71591754/create-secure-websocket-server-in-local-machine