storage providers

[mailyxf]

I noticed from the source code that it seems to support the S3 storage protocol, and I would like to ask how to configure S3 related information

[KernelDeimos]

Hello, some of the pieces are there but not yet everything. I'm going to change the title and add the "planned work" label.

[KernelDeimos]

I think #289 might be a prerequisite to this