multiple sites on forge (IP only)

I just deployed my repository "first.git" to my forge/digital ocean server. by creating a New Site and leaving "Root Domain" blank and Web directory to public. Then i can access it with the IP: http://111.222.33.444/

Now, I want to deploy multiple repositories - lets say "second.git" and "third.git". I tried setting Root domain to "third" and then deploy and hit http://111.222.33.444/third

But I guess thats not how you do it? I had a hard time understanding the other examples out there as I do not have domains at this stage, just the server IP.. Any tips apprechiated.