UI app ...Store, how to set the server value?

Hello all!,
We have a question about the correct way to configure the SessionStore object, that we find in /ui/src/stotes/ in chirpstack repo.
Please advice the correct way to configure the server address: with environment variable, indicate in package.json file, or in other place? Objects of …Store classes are created with empty string for the server host address.
In the application I did not find the place where the server address is specifically configured!
Of course, the chirpstack installation uses localhost:8080 in the orifinal setup. Maybe the emtry string falls back to localhost:8080…

If our App will run on separate host, how do we correctly configure host address for the Stores to be able to use these beautifull classes?