If you question is no longer about running PS from the cloud, which is not officially supported by Intuit, and want to ask about Windows Server version, you would want to post a new question because other users still only see the headline of your original question.

I don't use PS but it would appear that Windows Server 2016 remains the minimum requirement and there is no warning about any impending change for 2020.
https://accountants-community.intuit.com/articles/1859689-system-requirements-for-2019-proseries-pro...