use Silex\Application;
use Sergiors\Silex\Provider\DependencyInjectionServiceProvider;

$app = new Application();
$app->register(new DependencyInjectionServiceProvider());
$app['di.loader']->load('{your config file/dir}');

$app->get('/', function () use ($app) {
    return $app['di.container']->get('{your var}');
});

$app->run();