How to create an Azure VMSS with configs Microsoft Hosted Agent

Based on this article   here 
runner-images/README.md at main · actions/runner-images (github.com)

 I I've successfully created a VHD. But after this i would like to create a VMSS which would be connected to Azure Agent pool. 

The files created are creating a osprofile shown below

"image": {
              "uri": "https://msftazureblobgstore.blob.core.windows.net/system/Microsoft.Compute/Images/images/packer-osDisk.cfd5eba0-ac4c-4a33-b1eb-4e7f960387a3.vhd"
            },
            "vhd": {
              "uri": "https://msftazureblobgstore.blob.core.windows.net/vmcontainerec417fa8-1f52-46e1-ab32-0e07c37e8b13/osDisk.ec417fa8-1f52-46e1-ab32-0e07c37e8b13.vhd"
            },