Change from static public IP to sub.domain/domain config file(s)?

If you install jitsi-meet on a cloud server with a static public IP, and later on want to change the config files so that it will be responsive to a domain name; what configuration files need to be changed to make that happen. No Nginx or Apache, just the default Jetty web server?

You need to reconfigure as changes in configs of jvb, jicofo and prosody are needed. The safest way is to purge and re-install.

shortcut to the purge commands is here https://github.com/jitsi/jitsi-meet/issues/3336