Really useful introduction into how containers came about with Docker and then Windows Server Containers:
"For the last couple of years Docker and containers have been one of the hottest topics in dev circles, and in enterprises, around the world. The release of Windows Server 2016 last fall added a lot to the conversation by opening containers to Windows developers. How did the world of Windows and Docker come together?"
Containers - Bringing Docker To Windows Developers with Windows Server Containers
Comparing the Basic Architecture of Containers and Docker Across Windows and Linux