Start React Development server on netlify instead of a build

I have this project that does not load to the homepage when I build it. the development server, however, runs without any error. the built site also shows no error. So I want to run npm start to use the development server instead of npm run build as recommended.

Hi there,

We are a static web host; we don’t run programs for you at browse time. You must build, and then host the pre-built content. If you need to host a node app, you’ll need to find a different host, since our hosting follows this philosophy:

https://jamstack.org/