Relationship between ServerApp and ProxyHttp

[JosiahParry]

It has been a few months since I've modified my pingora proxy service. Coming back to the docs I notice that there is now a ServerApp concept that may be quite useful for my situation. But the documentation doesn't describe how it is intended to be used and the example that uses the trait is uncommented.

I have a struct that implements ProxyHttp. When I hit a specific path e.g. /ui I want to proxy to a different application. I think the ServerApp simplifies this proxying?

Other applications can be found at /myapp for example which uses websockets and the like and implementing the proxy to that proves quite difficult.

Can ServerApp be used to serve applications in a struct that implements ProxyTrait?