npm run dev in laravel project webpack said . resources/js/app.js is missing . but i downloaded this project and i want run in localhost . there is no such file app.js . in resources folder

am i missing something here??

here is looks like webpack code

mix.js('resources/js/app.js','public/js')
     .react()
    .sass('resources/sass/app.scss', 'public/css')
    .webpackConfig({
        module: {
            rules: [
                {
                    test: /.(jpg|png)$/i
                    // type: 'asset/images'
                }
            ]
        }
    });
    mix.disableNotifications()

this is my first time i try to run laravel project locally

i did the php artisan serve command in another cmd . website running but it is stuck in loader

i wonder maybe i should run another cmd for webpack npm run dev command

i did but it gives 1 error that app.js missing