[1.23.0]
Update ntfy to 2.20.0
Full Changelog
Add S3-compatible object storage as an alternative attachment store via attachment-cache-dir config option (#1656/#1672)
Reject invalid e-mail addresses (e.g. multiple comma-separated recipients) with HTTP 400
Add OpenRC init service file (#1650, thanks to @ageru for the contribution)
Important note: With this release, ntfy will take full control over the attachment directory or S3 bucket. Files/objects in the configured attachment-cache-dir that match the message ID format (12 chars, matching ^[A-Za-z0-9]{12}$), and have no entries in the message database will be deleted. Do not use a directory or S3 bucket as attachment-cache-dir that is also used for something else.