This is a system install of Alpine linux for Raspberry Pi 3B, 3B+ and 4 image ready to burn to an SD card via (balenaEtcher)[https://www.balena.io/etcher/] (there's no need to gunzip them).
The image automatically setup and configures:
- root user [pwd: raspberry]
- pi user [pwd: raspberry]
- ethernet
- wifi (edit
wpa_supplicant.confin the boot partition, on first boot it will be copied) - bluetooth
- avahi
- swap
- openssh server
- root partition auto-expand on first boot