Add Powershell script to set network category to private for DockerNAT.

cli-windows/set-dockernat-networkategory-to-private.ps1

@@ -0,0 +1 @@
+Get-NetConnectionProfile | Where-Object { $_.InterfaceAlias -match "(DockerNAT)" } | ForEach-Object { Set-NetConnectionProfile -InterfaceIndex $_.InterfaceIndex -NetworkCategory Private }