gcp app engine Error


check serve error
```typegcloud app deploygcloud app browse```

```typegcloud app logs tail```


### remove flex
> [ERROR: (gcloud.app.deploy) Error Response: [13] An internal error occurred during deployment. [Python-edition] · Issue #5218 · googleapis/google-cloud-python](https://github.com/googleapis/google-cloud-python/issues/5218)

### yarn start
> [502 Bad Gateway with nginx | Google App Engine | Node JS](https://stackoverflow.com/questions/41472049/502-bad-gateway-with-nginx-google-app-engine-node-js/47763895)

> [Troubleshooting response errors | Cloud Endpoints with OpenAPI](https://cloud.google.com/endpoints/docs/openapi/troubleshoot-response-errors#gae_errors)






