Have app.py launch uvicorn within it

[ejfine]

Is there an existing issue for this?

• I have searched the existing issues

Feature description

there's probably going to be a bunch of things we need to pass to the app via CLI anyway, and it's annoying to not be able to use if __name__=='__main__'. So rather than launching the app via uvicorn directly, have the docker container run the python script, which then launches uvicorn.

The exclusion of app.py in .coveragerc file can then also be removed