Npm already runs fine as a vm. If you mean having it available as a fully contained appliance I think that all the Windows dependencies in it basically prevent that. Eventually I could imagine it being available in a container but at this point container tools only support running CLI only on windows core so that's got a ways to go.
Have you ever seen a windows based vm appliance available for purchase? Because MS licensing makes that a non starter for other companies to sell a self contained windows based appliance.
