Custom base URL for s3 resource

Is it possible for you to add a custom base URL for s3 bucket resources? Non-AWS storage (digital ocean spaces, for example) can often be used like s3 if you can change the base URL: /reference/api/spaces-api/
Alternatively adding support for digital ocean resources (they use AWSv4 authentication, so could be as simple as adding the ability to include a custom AWS Region)

For posterity - this shipped a while back, so you can now indeed use custom bare URLs for S3 compatible resources like DigitalOcean Spaces. There's a little checkbox in the resource form you can click to get started:

More documentation on S3 here: