title: Docker push: push image once with multiple tags
body: <p>I have a docker image with three tags <code>repo:latest</code>, <code>repo:v1.1</code>, <code>repo:dev</code>. When I do <code>docker push repo:v1.1</code> only one tag will be pushed into repository. Is there a way to make one push with all tags or I need to push-per-tag?</p>