Found it 
https://youtu.be/7da-B3rY9V4?t=1168 … It was part of the “Docker for Mac and Windows: The Insider’s Guide by Justin Cormack” see: https://blog.docker.com/2016/07/dockercon-docker-developers/
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Found it https://youtu.be/7da-B3rY9V4?t=1168 … It was part of the “Docker for Mac and Windows: The Insider’s Guide by Justin Cormack” see: https://blog.docker.com/2016/07/dockercon-docker-developers/