React + Express how to properly deploy a build in production?

Question

Nginx

I have a React app and an Express server. There is also ubuntu 18.04 and Nginix. When I write npm run build. React asks to run

serve -s build

if I run it static React works. But if I turn off the console, it crashes.
Please tell me how can I run my React app. On my server so that it doesn't crash? And configure the Nginix proxy server. The fact that he would give the static React. And all requests that came from this static were redirected to node js.
PS I know that there is an option to connect via static Express.

spoiler

But this is a task that was implemented too crookedly when I wrote the Vue + Express application

Answer 1

You need some kind of process manager through which to run serve or the same express.
We use pm2.keymetrics.io/.

Answer 2

pm2 starts, which starts the server (express). We are going to sell the front build (it's just static).
Nginx proxies API requests and distributes static. There are many manuals.