Initial commit: Add Docker setup, database schema, and basic PHP application structure

www/card.php

@@ -0,0 +1,14 @@
+<?php
+$uuid = $_GET['uuid'] ?? 'keine UUID';
+if(isset($_COOKIE['PHPSESSID'])){
+    session_start();
+    if($_SESSION['is_admin']??false){
+        header('Location: /admin.php?uuid='. $uuid);
+        exit(0);
+    }
+}
+
+echo "UUID: " . htmlspecialchars($uuid);
+
+//TODO
+