added basic invoice rendering #97 #93 (#99)

src/Kernel.php

@@ -2,6 +2,7 @@
 
 namespace App;
 
+use App\DependencyInjection\AppExtension;
 use App\DependencyInjection\Compiler\DoctrineCompilerPass;
 use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
 use Symfony\Component\Config\Loader\LoaderInterface;
@@ -38,6 +39,8 @@ class Kernel extends BaseKernel
 
     protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader)
     {
+        $container->registerExtension(new AppExtension());
+
         $container->setParameter('container.autowiring.strict_mode', true);
         $container->setParameter('container.dumper.inline_class_loader', true);
         $confDir = $this->getProjectDir().'/config';