ldc-doux/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\Facades\URL;
use Illuminate\Support\ServiceProvider;
use App\Enums\Country;
use Illuminate\Support\Facades\Cache;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
    }

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        URL::forceScheme('https');

        // * HA PROXY FIX
        app()->singleton('clientIp', function () {
            if (config('app.env') === 'local') {
                return request()->getClientIp();
            }
            return request()->server('HTTP_X_FORWARDED_FOR') ?? request()->getClientIp();
        });

        $listCountries = Cache::remember('listCountries', 60, function () {
            return Country::toArray();
        });
        view()->share('availableCountries', $listCountries ?? Country::toArray());
    }
}