Issue with the "Run a Flask App" doc

[Jaspie88]

I found an issue with this document.

Title: Run a Flask App
Location: https://fly.io/docs/python/frameworks/flask/
Source: https://github.com/superfly/docs/blob/main/python/frameworks/flask.html.markerb

Describe the issue

Hey Team in the Flask App example you install Poetry and add Gunicorn but the dockerfile doesn't seem to use Gunicorn; it launches the Flask development server. Updating the example would be really useful for junior devs like me to avoid accidental developer server use.

Addtional info

[AshitaGK]

The same issue was raised in flyctl repository. I've pasted the link here. superfly/flyctl#3863 (comment)
@rubys can you please look into this?