Easiest way to make online server

What’s the simplest way to make a server to me and 1 friend playtest my game?

By hosting a server and then connect via ip address, here info how to setup server:

There also option to start a server in editor to when you extend play button menu.

Make sure you got port 7777 and 7778 forwarded in your router, or else no body from outside of your lan won be able to connect to your server