For Ruby and JRuby, I see that you maintain and release Docker images for the latest official releases, plus release candidates for Ruby (https://hub.docker.com/r/circleci/ruby/tags/ and https://hub.docker.com/r/circleci/jruby/tags/). For some projects it is nice to also test against the current master branch.
I guess I’m asking if you’d be interested in releasing regularly updated circleci/ruby:head and circleci/jruby:head Docker images?