add Twig for template rendering

src/Dependencies.php

@@ -5,9 +5,13 @@ namespace NoteCat;
 
 use DI\Container;
 use Psr\Container\ContainerInterface;
+use Slim\Views\Twig;
 
 class Dependencies
 {
+    private const TWIG = 'view';
+    private const TWIG_TEMPLATE_DIR = __DIR__ . '/../templates';
+
     public static function createContainer(): Container
     {
         $container = new Container();
@@ -15,6 +19,7 @@ class Dependencies
         // Controllers
         $container->set(HelloWorldController::class, function (ContainerInterface $c) {
             return new HelloWorldController(
+                $c->get(self::TWIG),
                 $c->get(HelloWorld::class)
             );
         });
@@ -24,6 +29,12 @@ class Dependencies
             return new HelloWorld();
         });
 
+        $container->set(self::TWIG, function (ContainerInterface $c) {
+            // TODO cache
+            $twigSettings = [];
+            return Twig::create(self::TWIG_TEMPLATE_DIR, $twigSettings);
+        });
+
         return $container;
     }
 }