Use stable channel for duplicati.

duplicati/docker-compose.yaml

@@ -10,12 +10,15 @@ volumes:
 
 services:
   duplicati:
-    image: duplicati/duplicati:beta
+    image: duplicati/duplicati:stable
     restart: unless-stopped
     volumes:
       - duplicati-conf:/data
       - nextcloud-data:/nextcloud:ro
       - /mnt/raid/nextcloud_data:/backup
+    environment:
+      DUPLICATI__DISABLE_DB_ENCRYPTION: true
+      DUPLICATI__WEBSERVICE_ALLOWEDHOSTNAMES: backup-asu.ddnss.de
     networks:
       - proxy
     ports: