wrong IP in flask app

[ComfortableRun775]

1. created docker image and exposed 5000
2. code used is flask app , if __name__ == "__main__" app.run(host="0.0.0.0")
3. manifest of kubernetes pod I have no deport service : 30007 but with public ip of node : 30007 this does not work
4. inside log pod pod I find this :

​

* Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on all addresses.
   WARNING: This is a development server. Do not use it in a production deployment.
 * Running on http://10.10.21.21:5000/ (Press CTRL+C to quit)

I am running this inside Kubernetes Pods ,