download rkt image from local s3

[Jared Hellman]

Hi, we'd like to be able to download our aci directly via URL from our local minio instance (s3-like local storage) located at my.minio.box:9000  .   It's not clear to me from the docs if this is supported.  I found the AWS configuration bit listed as /etc/rkt/auth.d/coreos-aws.json but it doesn't seem to help.  Can someone please explain?   Thanks!