Definition:
Docker is an open platform for developers and sysadmins to build, ship and run distributed applications. Consisting of Docker Engine, a portable, lightweight runtime and packaging tool and Docker Hub, a cloud service for sharing applications and automating workflows, Docker enables apps to be quickly assembled from components and eliminates the friction among the development, QA and production environments. As a result, IT can ship faster and run the same app, unchanged, on laptops, data center VMs and any cloud.
In this Channel 9 video, you'll get a quick overview of Docker and its benefits. You will also learn about containers and how containers and Docker are related. The video also talks about how Docker is related to .NET developers and Visual Studio.