add data persistence

mariadb/docker-compose.yml

@@ -5,6 +5,8 @@ services:
     restart: always
     ports:
       - 3306:3306
+    volumes:
+      - /var/mariadb-data/_data:/var/lib/mysql
     environment:
       - MARIADB_ROOT_PASSWORD=${MARIADB_ROOT_PASSWORD}
     command: --log-bin --binlog-format=MIXED --log-basename=1000 --server-id=1000