This system works by launching an official Windows image in Docker and then making an RDP connection to it. There are a couple of others too now like WinBoat
What all of them avoid mentioning is that the images were intended by Microsoft for test and development purposes on Windows and the license clearly states you need a valid Windows license to use them: https://hub.docker.com/r/microsoft/windows#license
I wonder if Microsoft will take some action to enforce this if these projects become popular.
Edit: This comment is incorrect, see below comment from
doctorpangloss
What all of them avoid mentioning is that the images were intended by Microsoft for test and development purposes on Windows and the license clearly states you need a valid Windows license to use them: https://hub.docker.com/r/microsoft/windows#license
I wonder if Microsoft will take some action to enforce this if these projects become popular.
Edit: This comment is incorrect, see below comment from doctorpangloss