I can access the app using localhost:3000 but I am trying to test from mobile devices locally, without having to deploy it. But I couldn\'t access the site.
I am all
Your service is probably only running locally (on local ports, 127.0.0.0/8), To confirm this, run netstat -tulpn
to see what services are running and on what ports/interfaces. If you don't see 0.0.0.0:3000 or 128.84.125.239:3000 then you won't be able to get ti it from the IP you are trying and you need to change the bind address of your app to be that IP (or all interaces).