If I install it to the discourse2 folder and run the command ./discourse-setup, will the site be installed?
Do I have to do anything with the nginx port?
Port 80 appears to already be in use.
This will show you what command is using port 80
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
docker-pr 1241 root 4u IPv4 26166 0t0 TCP *:http (LISTEN)
docker-pr 1247 root 4u IPv6 26172 0t0 TCP *:http (LISTEN)
If you are trying to run Discourse simultaneously with another web
server like Apache or nginx, you will need to bind to a different port
See https://meta.discourse.org/t/17247
If you are reconfiguring an already-configured Discourse, use
./launcher stop app
to stop Discourse before you reconfigure it and try again.