There was a Web Browser game called QuakeJS that use Quake 3 with JavaScript.
I know a Docker Version exist for Self-Hosting. I was wonder if it’s possible to port it over to YunoHost for self-hosting a server. And maybe use a Domain Name instead of IP Address.
As mentioned yesterday, that’s the job of the wishlist. Use it. 
You will encounter a rate limit that prevents you from posting a suggestion more than once every 15 days. That’s normal, it’s to spare packaging volunteers from being flooded by requests from too eager newcomers or… slavers. 
Hint: there is no license for it, that would be an issue for its packaging.
A domain name is mandatory to use any YunoHost app. Are you actually a YunoHost user?