Test with an S3 compatible object storage

[jtpio]

To more easily test the extension, it could be interesting to use something like:

• https://github.com/minio/minio
• https://github.com/seaweedfs/seaweedfs (mentioned by @trungleduc)

For reference this repo uses MinIO in Docker for testing: https://github.com/danielfrg/s3contents. We could look into using a similar approach with the minio/minio:RELEASE.2021-11-09T03-21-45Z Docker image.

This would be useful for both local testing and also for the UI tests.