create-react-app package.json

package.json

"scripts": {
    "start": "PORT=3001 react-scripts start",
    "start:production": "npm run build && npm run start:prod",
    "start:prod": "NODE_ENV=production node server",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  }