In the project directory, you can run:

Runs the React app in the development mode.
Open http://localhost:3000 to view it in the browser.

This command should run another sperate terminal. This will run the electron process.

Now you can see running electron application.

This will create build folder.

important :- before run this delete all unwanted files from public folder.

This will create dist folder and inside it has installer(.exe).

Note: when build .exe file first you need run first npm run build and after npm run electron-pack.