and going back to a handle you could input in your client to look for the user/file, like @nick@domain.tls I think Webfinger is the way to go. It has enough information to know where to find that nick's URL.

@prologic does that webfinger fork made by darch work OK with yarn as it is now? (I've never used it, so I'm researching about it) https://darch.dk/.well-known/webfinger/