### What needs to get done Currently, the gunicorn config is hardcoded [here](https://github.com/canonical/rockcraft/blob/main/extensions/flask-framework/gunicorn.conf.py). However, in many scenarios, it is essential to override some of the settings (Example: changing worker type to async workers, modifying number of workers, etc). This can be done either with a file override, passing the `GUNICORN_CMD_ARGS` env variable, or allowing CLI arguments. See [the docs](https://docs.gunicorn.org/en/stable/settings.html) for more info In my case, we need to use `async` workers instead of the default `sync` ones