I was able to mount azure blob storage on my local machine (Ubuntu 18.04) using blobfuse, just as documented here.
To use it in an Azure App Service I found this, describing an option to mount Azure Storage using the Azure Portal interface. This does it for me...
But how can I access the mounted storage from within my Django app?
Is the mounted Storage accessible as directory via the filesystem?
Turns out this is pretty obvious and now also well documented.
When mounting the Storage you have the option to specify the mount path.