The current release as of September 11, 2018, is 3.8.1. Since Alpine 3.5.0, there is support for aarch64 using the uboot bootloader and for armhf (32-bit). A Raspberry Pi 32-bit distribution is also available. Version 3.7.0 adds EFI and GRUB boot loader support.
The Docker image is only 5 MB in size and has access to a package repository that is much more complete than other BusyBox based images. This makes Alpine Linux a great image base for utilities and even production applications and a popular base container for containerized applications. The Docker repository also includes the “edge” distribution, which includes the very latest package updates and which is updated more frequently.