self-hosting without publish when expo detached(ejected) standalone app

Any solutions found to use expo export with expokit project.

I have posted a question Expo's call to initial url taking too much time to respond - #2 by somangshu. No help received yet. The doc also refers to the expo app where you use the expo build command.

I need to understand where exactly in the expokit app the published url needs to be changed.

Please help, My production app opens very slowly in a slow internet connection.