Azure Files volume mounting is not supported in Windows containers. I'm aware I can use AzCopy with Azure Files, but I was wondering if there was a simpler way that doesn't involve creating an Azure storage resource. Because I would have the added work of maintaining the creation/teardown of these storages.
Ideally, I would like the host agent (running create container), to simply copy the files directly to the container instances, therefore the files are tied to the execution of the hosting agent.
As I know there is no way to copy files to the Windows-based Azure container instance except the command. The AzCopy command is OK. It's impossible that you want to do something on the host agent. You can do nothing with the ACI host agent. Additionally, the ACI is more suitable for a quick test and running of the images.
If you want to copy files and other controls on the containers, I recommend the AKS. You can run the Windows-based containers in the AKS with Windows nodes, and the Azure File volume is also available for the Windows containers. See the information here.