raspberry-pi-4

Hi! Thank you for making this repo and managing these patches. This isn't a bug report! I am targeting an older version of Debian (9/stretch) than what is currently supported in this project (10/buster). I ran into a few snags but I figured I would share the workarounds I had to do to make it work in case someone else tries to do the same and wants to save some time figuring it out.

**Issue 1:

21.12-alpine3
21.12-alpine3.15
21.12-alpine3.15.0

alpine-21.12
alpine3-21.12
alpine3.15-21.12