laravel-package-skeleton/public/manifest.json

{
  "resources/js/app.js": {
    "file": "app.js",
    "isEntry": true,
    "src": "resources/js/app.js"
  },
  "resources/sass/app.scss": {
    "file": "app.css",
    "isEntry": true,
    "src": "resources/sass/app.scss"
  }
}