asp.net core 6 with react does not run on same server

Question

I was using asp core 5 in which react and asp.net backend was running on same server and now I want to make project in asp.net core 6 with react same as 5 but in 6 it does not run on same server and when go to production only the backend runs

Need Help... how to make it run on same server

backend runs on https://localhost:7228/

and frontend runs on http://localhost:3000/