stagfe2/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Routing\UrlGenerator;
use Illuminate\Support\ServiceProvider;

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

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot(UrlGenerator $url) 
    {
        if (config('app.env') !== 'local') {
            $url->forceScheme('https');
            $this->app['request']->server->set('HTTPS','on');
        }
    }
}