some fixing

server/routes/rooms.js

@@ -198,7 +198,7 @@ router.post('/:uid/start', authenticateToken, async (req, res) => {
       return res.status(404).json({ error: 'Raum nicht gefunden oder keine Berechtigung' });
     }
 
-    await createMeeting(room);
+    await createMeeting(room, `${req.protocol}://${req.get('host')}`);
     const joinUrl = await joinMeeting(room.uid, req.user.name, true);
     res.json({ joinUrl });
   } catch (err) {
@@ -326,7 +326,7 @@ router.post('/:uid/guest-join', async (req, res) => {
 
     // If meeting not running but anyone_can_start, create it
     if (!running && room.anyone_can_start) {
-      await createMeeting(room);
+      await createMeeting(room, `${req.protocol}://${req.get('host')}`);
     }
 
     // Check moderator code