How to properly build a React project on Heroku?

Question

JavaScript

Made a project on React, reached the deployment on Heroku.
I can not figure out the correct setting of packege.json, namely "scripts".
Now it looks like this:

"scripts": {
    "start": "serve -s build",
    "build": "set HTTPS=true&&react-scripts build",
    "test": "set HTTPS=true&&react-scripts test --env=jsdom",
    "eject": "set HTTPS=true&&react-scripts eject"
  },

As a result, we get a bunch of unnecessary files, libraries and all project files in open form:

How to properly configure scripts to remove all unnecessary files and hide project files?

Answer 1

put the .env file with one line in the react folder, it should help, it helped me
https://stackoverflow.com/a/54609789