I tried this on my Windows 10 machine:
Dockerfile:
From microsoft/nanoserver
CMD [\"echo\", \"Hello World\"]
Switch to Windows Container needs to selected from docker icon running under hidden icon from the bottom right... The moment you switch from Linux to Windows or Windows to Linux, Docker
daemon automatically restarts to consider switched container...
I would highly recommend you to view these 2 links to get more insight into how to create window containers:
Forum post
Blog post
I really found the content of these links very helpful to make a window container which is still being enhanced for the generic issue we are all are facing since support for window container is yet to mature like Linux containers!