Set default template name in Renderer class and updated imprint.html with official registration and tax identification numbers.

include/renderer.php

@@ -8,7 +8,7 @@ use Webklex\PHPIMAP\Client;
 require 'vendor/autoload.php';
 
 class Renderer {
-    protected string $templateName;
+    protected string $templateName = 'index';
     private array $menuItems = [];
     protected array $internalMenuItems = [];
     protected $hiddenCount = 0;
@@ -48,7 +48,7 @@ class Renderer {
         $scriptName = $this->getScriptName();
         if (!in_array($scriptName, array_merge($this->menuItems, $this->internalMenuItems))) {
             header('Location: /', true, 301);
-            return;
+            exit;
         }
         $this->templateName = $templateName ?: (!in_array($scriptName, ['ffajs', 'fvajs', '', '/']) ? $scriptName : 'index');
         $this->connectDb();