Some apps, especially recently, store and access data via an s3-compatible api. I think Cloudron should add s3 storage as a new addon that can be requested in CloudronManifest.json to better support packaging such apps.

Some potential apps that would use this addon:

Here are some numbered opinions so you can refer to (refute) them:

I think it should be implemented as a Minio server which is set up like the postgresql or mysql addons in that the one instance is configured automatically and can serve a number of different apps. Say, each app that has the s3 addon gets a new random bucket and creds for that bucket.
Ideally it can be configured in either local or gateway mode. Users can use local if there is enough storage on their server, or configure a gateway to point to any S3-compatible, Azure, or NAS service. Note that many service providers offer an S3-compatible storage API, so the list of supported providers is already much bigger than just those three, and includes hosts like Backblaze, Linode, DigitalOcean among many others.
Figuring out how backups should work will probably be the biggest issue. Here are a few potential solutions:
a. Just clone / replicate the whole bucket on every backup. Might cost a lot of storage, but that's how backups work today so... See: Bucket Replication Guide
b. Something-something object versions? Though it might be difficult to, say, take a snapshot of a whole bucket. Bucket Versioning Guide
c. Minio contributors don't seem very receptive to the general idea of bucket-level shapshots. Taking Backups of MinIO #4398, Snapshots #9376
d. Just don't support backups at all? (not a fan of this option, but it's technically an option)

Thoughts?

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