At HC's request, created a TEIC org and a jenkins repo on hub.docker.com, and pushed the image up there. I first had to do a clean build after deleting every docker image that could be found on the system (docker rmi -f tei-jenkins && docker rmi $(docker images -a -q)), then I built (docker build -t teic:jenkins .) and tagged the build (docker tag 61c5096c86b2 teic/jenkins) then pushed it (docker push teic/jenkins). Took a while to figure out how to do that, so I'm documenting here. I think pushing an image only works when it's tagged with exactly the right org/repo tag.