Yeah, it's probably Azure introducing the problem. I can give it a go myself at some stage (I'm playing a lot with containers\Kubernetes at the moment). What are you using - App Services (for containers) or Container Instances or Kubernetes Services?
I don't think Azure Storage will work with Perch. It may work with Runway, but will probably need a storage driver written for it. Runway comes with storage drivers for AWS S3, Dropbox and OpenStack.
With containers, there is a way to get round the…