As the title says - I changed the port to 79 and you can see it here
casaos@CasaOS:~$ sudo netstat -lnp | grep 79
[sudo] password for casaos:
tcp 0 0 127.0.0.1:35079 0.0.0.0:* LISTEN 1032/casaos
tcp6 0 0 :::79 :::* LISTEN 647/casaos-gateway
unix 2 [ ACC ] STREAM LISTENING 17987 1145/dbus-daemon @/tmp/dbus-szuM1qGPwi
so what's the easiet way to resume the WebUI to port 80?