I'm excited to share that #netatalk 4.2 is now included in the recently released Alpine Linux 3.22! (Community repo)
https://pkgs.alpinelinux.org/package/v3.22/community/x86_64/netatalk
It's never been easier to get started with AFP and AppleTalk networking on a musl based Linux system.
Making this happen involved taking on maintainership of the aport myself. If someone reading this would like to take over and get some experience with package management, please let me know.