updated container versions

nextcloud/docker-compose.yml

@@ -6,7 +6,7 @@ volumes:
 
 services:
   nextcloud_db:
-    image: mariadb
+    image: mariadb:10.5
     restart: always
     command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
     volumes:
@@ -20,7 +20,7 @@ services:
       - nginx_network
 
   app:
-    image: nextcloud
+    image: nextcloud:21
     container_name: nextcloud
     restart: always
     ports: