Problems when operating behind a reverse proxy

[oe2lsp]

When PhantomSDR is operated behind a reverse proxy with a "subdirectory" pointing to the Phantom like "/sdr/" many paths are set to absolute "/" and thereby make an operation is not possible as many paths are not found

More concrete:
imports in js files, most of imports are relative like "./assets/...." but some of them are missing the point at the beginning.

in file "dist/assets/index-D4exed7n.js" the path to the websockets "/audio", "/waterfall" and so on are once again absolute and ignore the relative path if operated behind a reverse proxy.