https://docs.docker.com/mac/
install Jenkins build server
https://wiki.jenkins-ci.org/display/JENKINS/Installing+Jenkins+with+Docker
https://www.cloudbees.com/blog/using-jenkins-docker
In case the docker container misbehave, stop or remove them.
docker stop $(docker ps -a -q)
docker rm $(docker ps -a -q)http://yum.baseurl.org/wiki/RepoCreate
