We are pleased to share that Alpine is officially available for POWER and z. Many people were instrumental in making this possible: @leitao110000JQ8Q, @4M9K_Roberto_Guimaraes2700044M9K, and Tuan Hoang, to name a few -- not to mention the amazing folks at Alpine.
In addition to Alpine being available, it is in Docker Hub for both architectures:
Thanks to the folks at Infosiftr!
The first release made available is 3.6. For more information, see the official Alpine release announcement: https://www.alpinelinux.org/posts/Alpine-3.6.0-released.html