text: Title: Add an official Discord channel or other forum in the README
  Body: Thank you for this excellent package!  I love it, and it makes my work much better.  Could there be an official discord to ask questions (that are not really issues) in?  For example, I want to talk to other like-minded people about how to add a default 403 response to all of our endpoints without annotating every action on every APIView, but the Issues page of the project isn't the right place to ask for that kind of help.  Adding an official free discord would be a useful (and theoretically simple?) add.