Use different file stores based on config

modules/joex/src/main/resources/reference.conf

@@ -646,6 +646,41 @@ Docpell Update Check
     # restrict file types that should be handed over to processing.
     # By default all files are allowed.
     valid-mime-types = [ ]
+
+    # The id of an enabled store from the `stores` array that should
+    # be used.
+    #
+    # IMPORTANT NOTE: All nodes must have the exact same file store
+    # configuration!
+    default-store = "database"
+
+    # A list of possible file stores. Each entry must have a unique
+    # id. The `type` is one of: default-database, filesystem, s3.
+    #
+    # The enabled property serves currently to define target stores
+    # for te "copy files" task. All stores with enabled=false are
+    # removed from the list. The `default-store` must be enabled.
+    stores = {
+      database =
+        { enabled = true
+          type = "default-database"
+        }
+
+      filesystem =
+        { enabled = false
+          type = "file-system"
+          directory = "/some/directory"
+        }
+
+      minio =
+       { enabled = false
+         type = "s3"
+         endpoint = "http://localhost:9000"
+         access-key = "username"
+         secret-key = "password"
+         bucket = "docspell"
+       }
+    }
   }
 
   # Configuration of the full-text search engine.