Docker image on Windows

I use AppVeyor as my build server and they only support Windows images (this week they soft released a paid upgrade to support Windows and Linux, but I don't want to pay extra just to use Azurite for my tests).

Would it be possible to publish both a Linux and Windows based docker image?

For now my build scripts check to see if they're running on AppVeyor and if so start up the Windows storage emulator instead of setting up Azurite. I'd prefer to run the same for dev & ci though.

I tried using the node package instead of docker but when you run that it blocks and the build never completes. Docker seems to be the best solution for both local dev & ci.