fix healthcheck of nextcloud db

nextcloud/docker-compose.yaml

@@ -111,9 +111,12 @@ services:
       - nextcloud
       - mariadb
     healthcheck:
-      test: ["CMD", "mysqladmin" ,"--user" ,"$MYSQL_USER" ,"--password=$MYSQL_PASSWORD" ,"ping" ,"-h" ,"localhost"]
-      interval: 20s
-      timeout: 3s
+      test: [ "CMD", "healthcheck.sh", "--connect", "--innodb_initialized" ]
+      start_period: 1m
+      start_interval: 10s
+      interval: 1m
+      timeout: 5s
+      retries: 3
     labels:
       - "docker.group=netxtcloud"