db user restrict access to container

compose.yaml

@@ -1,6 +1,7 @@
 services:
   db:
     image: mariadb:lts
+    command: "--skip-name-resolve=OFF"
     restart: always
     healthcheck:
       test: ['CMD', 'healthcheck.sh', '--connect', '--innodb_initialized']
@@ -30,6 +31,7 @@ services:
     restart: always
     # Comment following line to use flask (1worker, dev), uncomment to use uwsgi (wsgi)
     #command: ["uwsgi", "--http", "0.0.0.0:8000", "--master", "-p", "4", "-w", "microblog:app"]
+    container_name: backend
     environment:
       - MYSQL_USER=flasku
       #- MYSQL_PASSWORD=flaskp
@@ -127,4 +129,6 @@ volumes:
 
 networks:
   backnet:
+    name: backnet
   frontnet:
+    name: frontnet