Sorry for butting in and not reading the whole thread but OP’s problem I had myself the first time I tried to setup Discourse. Port 80 and port 443 are not open because the app isn’t using them yet. The trick is to run skip-network-check or some such command (can’t remember and at work) and setup skips the port check and then goes forward with the setup. It is in the standard setup instructions but it is easy to miss
Sorry if someone else already got this
Thanks to Jay below command is
--skip-connection-test