Fix nextcloud-cache permissions issue

docker/stacks/nextcloud/nextcloud.yml

@@ -5,6 +5,8 @@ services:
       user: ${PUID}:${PGID}
       networks:
          - nextcloud
+      volumes:
+         - ${APPS_DIR}/nextcloud-cache:/data
       ports:
          - 6379:6379
       restart: unless-stopped