Laravel php artisan generate sitemap command

GenerateSitemap.php

<?php

namespace App\Console\Commands;

use App\Models\Course;
use Illuminate\Console\Command;
use Spatie\Browsershot\Browsershot;
use Spatie\Crawler\Crawler;
use Spatie\Sitemap\SitemapGenerator;
use Spatie\Sitemap\Tags\Url;

class GenerateSitemap extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'sitemap:generate';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'generate sitemap using spatie\'s sitemap package';

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {
        parent::__construct();


    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        // adding our own browsershot to add the noSandbox option to chrome, since it is run by the root user in docker container
        $browsershot = (new Browsershot())->noSandbox()->ignoreHttpsErrors();
        $path = public_path('sitemap.xml');
        $sitemap = SitemapGenerator::create("https://nginx/")
            ->configureCrawler(function (Crawler $crawler) use ($browsershot){
                $crawler->setBrowsershot($browsershot);
            })
            ->hasCrawled(function (Url $url){
                // overwriting the base nginx url in our sitemap. Without this the url display in the xml will look something like this: https://nginx/uri
                $uri = implode('/', $url->segments());
                $url->setUrl(config('app.url') . '/' . $uri);
                return $url;
            })
            ->getSitemap()
            // adding the base slug routes
            ->add(Url::create('/courses')->setPriority(0.9))
        ;

        // for some reasons laravel sitemap can only detect static pages. This is a workaround to add slug routes
        $courses = Course::all();
        $courses->each(function ($course) use (&$sitemap){
            $sitemap->add('/courses/' . $course->slug );
        });
        $sitemap->writeToFile($path);
    }
}