add minio storage to backup volumes and readme update

Signed-off-by: Simon L. <szaimen@e.mail.de>

community-containers/minio/minio.json

@@ -21,6 +21,9 @@
                 "writeable": true
             }
             ],
+            "backup_volumes": [
+                "nextcloud_aio_minio"
+            ],
             "nextcloud_exec_commands": [
                 "php /var/www/html/occ config:system:set objectstore class --value 'OC\\Files\\ObjectStore\\S3'",
                 "php /var/www/html/occ config:system:set objectstore arguments autocreate --value true --type bool",

community-containers/minio/readme.md

@@ -1,6 +1,12 @@
 ## Minio
 This container bundles minio s3 storage and auto-configures it for you.
 
+>[!WARNING]
+> Enabling this container will remove access to all the files formerly written to the data directory.
+> So only enable this on a clean instance directly after installing AIO.
+> All additional users that are added via Nextcloud afterwards are going to work correctly.
+> Also, after enabling and using it, make sure to not disable the container as you cannot migrate from s3 to local storage anymore and s3 is a critical part of your infrastructure from then on.
+
 ### Notes
 - The data of Minio will be automatically included in AIOs backup solution!
 - See https://github.com/nextcloud/all-in-one/tree/main/community-containers#community-containers how to add it to the AIO stack