Have you actually looked at the samples ? You have no information about what is actually required on the guest OS side to make it launchable by HCS. It launches an OS (Windows) that already knows how to interface with HCS.

As I said, the docker hcs shim might help one figure everything out, but that's not documentation.

Edit: removed unnecessary flaming

He may be partly right. The sample code is 4 years old. But the documentation is recent (at least the url linked by gp) :

After 2021 june 27 : https://web.archive.org/web/20210627204757/https://docs.micr...

Before 2021 june 27 : https://web.archive.org/web/20210414223813/https://docs.micr...