error setting up

Hi,
i am trying to get it running. But the error comes up:

```
Traceback (most recent call last):
  File "/run.py", line 9, in <module>
    from app.main import app
  File "/app/main.py", line 25, in <module>
    homebridgeWebhookUrl = settings["homebridgeWebhookUrl"]
KeyError: 'homebridgeWebhookUrl'
```

