Grundlegender Aufbau erstellt.

api/src/Controller/HelloWorldController.php

@@ -0,0 +1,22 @@
+<?php /** @noinspection PhpUnused */
+
+
+namespace TorstenHettstedt\TimekeepingApi\Controller;
+
+use Slim\Psr7\Response;
+use Slim\Psr7\Request;
+
+class HelloWorldController
+{
+    /** @noinspection PhpUnusedParameterInspection */
+    public function read(Request $request, Response $response, $args): Response
+    {
+        $payload = json_encode('Hallo World');
+
+        $response->getBody()->write($payload);
+
+        return $response
+            ->withHeader('Content-Type', 'application/json')
+            ->withStatus(200);
+    }
+}