I am building a progressive web app for printer management, which will be deployed in a local network. Since it is a PWA, it needs to be served over HTTPS, so HTTP is not an option. Currently, I am using HTTPS localhost to create an HTTPS server on localhost, but that certificate obviously is not valid when other devices visit the URL and I get a warning message.
What is the best (and easiest) way to get a valid HTTPS server running in a local network?