Add Windows Installation Instructions
We should document an installation process on Windows.
Current status:
- Windows subsystem for Linux: Tested, does not work. gitlab-org/omnibus-gitlab#2295
- Docker for Windows: Multiple issues that need to be worked around with volumes. For example: https://stackoverflow.com/questions/44684621/volume-trouble-with-gitlab-docker-image-on-windows
So far have not seen much demand. Only one