Another tool that does just this would be Deis[1]. We specifically combine CoreOS (in heavy development[2]), Docker, Heroku Buildpacks, and also Dockerfile deployments[3], too!

[1]: http://deis.io/

[2]: https://github.com/opdemand/deis/issues/530

[3]: http://docs.deis.io/en/latest/developer/dockerfile/#deploy-u...