A simple HTTP server for serving a single file (Based on Windows HTTP Server API)
Detailed documentation on this API: https://docs.microsoft.com/en-us/windows/win32/http/http-api-start-page.
The sample program, based on Microsoft's official documents, has been modified to provide a simple function of returning only a single file when accessed over HTTP.
When accessed from outside the localhost, the listening port is not this program, but this process: ntoskrnl.exe, so note the firewall rules.