Implement Account model; small style changes; Twig debug setting

src/Settings.php

@@ -10,10 +10,23 @@ class Settings
         return getenv('APP_DEBUG') === 'true';
     }
 
+    public function getTimezone(): string
+    {
+        return 'Europe/Berlin';
+    }
+
+    public function getDateFormat(): string
+    {
+        // Default date format (https://www.php.net/manual/en/datetime.format.php)
+        // RFC 2822 formatted date (Thu, 21 Dec 2000 16:01:07 +0200)
+        return 'r';
+    }
+
     public function getTwigSettings(): array
     {
         return [
             'cache' => getenv('TWIG_CACHE_DIR') ?: false,
+            'debug' => $this->isDebugMode(),
             'strict_variables' => getenv('TWIG_STRICT') === 'true',
         ];
     }