We don't provide such a driver at this moment.
https://jsreport.net/learn/template-stores
Maybe you can just map the disk and use it?
https://jsreport.net/learn/fs-store#running-in-cluster
Or choose from the provided drivers.
Or I see minio is compatible with S3 and we have a driver for that.
Or create your templates during the development phase, prepare a docker image that includes them already and don't use persistent storage at all.
You won't be able to edit templates in real-time in production, but that doesn't need to hurt.