Related: using Jenkins+Docker in a similar fashion myself I extracted most of what I do into a Jenkins plugin for publishing images (I was an early user of the private docker repos): <a href="https://wiki.jenkins-ci.org/display/JENKINS/Docker+build+publish+Plugin" rel="nofollow">https://wiki.jenkins-ci.org/display/JENKINS/Docker+build+pub...</a>
Though I like automated deployment flows and docker, the author should have stated that docker itself claims to be not production ready in the current 0.9 version. I am a true fan of bleeding-edge technology, but when it comes to production I would like to see a more conservative approach.