Docker registry - yszheda/wiki GitHub Wiki
- https://github.com/docker/docker-registry
- http://blog.huatai.me/2014/10/03/Deploy-Docker-Registry-test-environment/
- https://www.digitalocean.com/community/tutorials/how-to-set-up-a-private-docker-registry-on-ubuntu-14-04
- https://blog.tankywoo.com/docker/2014/05/08/docker-3-docker-registry.html
server gave HTTP response to HTTPS client
- https://github.com/docker/distribution/issues/1874
- http://stackoverflow.com/questions/38695515/can-not-pull-push-images-after-update-docker-to-1-12