Doc holes in FastAPI instrumentation

Mentioning FastAPI specifically as that's what I'm using but I wouldn't be surprised if it held true for the others. So coming to add opentelemetry instrumentation as someone primarily not using python but using other language ecosystems I don't want to rely on assumptions on what's provided as not every language is equally fleshed out in opentelemetry IME.

So in these docs https://opentelemetry-python-contrib.readthedocs.io/en/latest/instrumentation/fastapi/fastapi.html#usage the missing information for me is:

1. What environment variables can set things up? Do I have ones like OTEL_EXPORTER_OTLP_ENDPOINT OTEL_EXPORTER_OLTP_PROTOCOL OTEL_SERVICE_NAME or does this have to be setup separately
2. Does trace propagation work or do I need manual intervention
3. If it does work does it also work for websocket requests?
4. How do I integrate logs so they show up as events
5. There should be a link to the opentelemetry-instrumentation package I had to search pypi for it because it's not a very google friendly name (a lot of things related to general python, languages I use more often and opentelemetry in general)

Start with the FastAPI instrumentation page at instrumentation/fastapi/fastapi.html and review the five missing topics listed in the issue. Check the repository's existing documentation and package references for environment variables, propagation, WebSocket requests, log events, and the opentelemetry-instrumentation package. Done means the page addresses each question and links to the package.