Denis

'gcs' => [
            'driver' => 'gcs',
            'key_file_path' => '', // optional: /path/to/service-account.json
            'key_file' => [], // optional: Array of data that substitutes the .json file (see below)
            'project_id' => '', // optional: is included in key file
            'bucket' => '',
            'path_prefix' => '', // optional: /default/path/to/apply/in/bucket
            'apiEndpoint' => 'https://storage.googleapis.com/', // see: Public URLs below
            'visibility' => 'public', // optional: public|private
            'metadata' => ['cacheControl'=> 'public,max-age=86400'], // optional: default metadata
            'throw' => true // 
        ],

const mix = require('laravel-mix');

/*
 |--------------------------------------------------------------------------
 | Mix Asset Management
 |--------------------------------------------------------------------------
 |
 | Mix provides a clean, fluent API for defining some Webpack build steps
 | for your Laravel applications. By default, we are compiling the CSS
 | file for the application as well as bundling up all the JS files.
 |
 */

mix.js('resources/js/app.js', 'public/js').vue()
    .sass('resources/sass/app.scss', 'public/css');