Runs the Electron app in development mode.
Also available at http://localhost:3000 to view it in the browser.
The program/page will reload if you make edits.
You will also see any lint errors in the console.
Use CTRL + SHIFT + I to open developer tools.
Builds the app for production to the out folder.
It correctly bundles React + Electron in production mode and optimizes the build for the best performance, producing an installer.