mac

"scripts": {
    "dev": "PORT=3005 next dev",
    "build": "next build",
    "start": "next start",
    "lint": "next lint",
    "test": "jest"
  },

windows

"scripts": {
   
    "start": "craco start -p 4000",
    "build": "craco build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },