Built images are available here: https://hub.docker.com/r/rubylang/ruby/
rake docker:build ruby_version=<Ruby version you want to build>
You can specify the specific revision in the master branch like:
rake docker:build ruby_version=master:ce798d08de
If you specify arch=arm64 option to the rake task, you can build images of 64bit ARM architecture:
rake docker:build arch=arm64 ruby_version=<Ruby version you want to build>
The default value of the arch option is amd64.
Kenta Murata
MIT