Feature: Disable access log when using live-reload

[RafaelWO]

When using gunicorn (via start.sh), one can disable the API access log via setting the corresponding environment variable to an empty value: ACCESS_LOG=. However, this is not possible when running the app with uvicorn and live-reload (via start-reload.sh).

But since you can pass the option --no-access-log to uvicorn (see docs), the script could be extended to disable the access log if the variable is set to an empty value.

[tiangolo]

Now that Uvicorn supports managing workers with --workers, including restarting dead ones, there's no need for Gunicorn. That also means that it's much simpler to build a Docker image from scratch now, I updated the docs to explain it.

Because of that, I deprecated this Docker image: https://github.com/tiangolo/uvicorn-gunicorn-docker#-warning-you-probably-dont-need-this-docker-image

That also means that all the configurations are much simpler as you only need to deal with Uvicorn, not with Gunicorn on top. 😎