They also announced the Docker Certified program [1] but with no technical details about what that involves beyond hand waving that "containers are tested, built with Docker recommended best practices, are scanned for vulnerabilities, and are reviewed before posting on Docker Store."

Is there some set of automated tests my container has to pass? Can I run them today? More to the point, how much will it cost me?

[1] https://blog.docker.com/2017/03/announcing-docker-certified/