Standardize compose file

opt/mpa_wordpress/docker-compose.yml

@@ -1,31 +1,39 @@
 version: "3"
 
+networks:
+  mpa-wp:
+    external: false
+
 services:
   db:
     image: mariadb:10.10.2
-    volumes:
-      - db_data:/var/lib/mysql
     restart: unless-stopped
     environment:
       MARIADB_ROOT_PASSWORD: ${MARIADB_ROOT_PASSWORD}
       MARIADB_USER: ${MARIADB_USER}
       MARIADB_PASSWORD: ${MARIADB_PASSWORD}
       MARIADB_DATABASE: ${MARIADB_DATABASE}
+    networks:
+      - mpa-wp
+    volumes:
+      - db_data:/var/lib/mysql
 
   wordpress:
-    depends_on:
-      - db
     image: wordpress:6.1.1
-    volumes:
-      - wordpress_data:/var/www/html
-    ports:
-      - "8008:80"
     restart: unless-stopped
     environment:
       WORDPRESS_DB_HOST: db
       WORDPRESS_DB_USER: ${MARIADB_USER}
       WORDPRESS_DB_PASSWORD: ${MARIADB_PASSWORD}
       WORDPRESS_DB_NAME: ${MARIADB_DATABASE}
+    networks:
+      - mpa-wp
+    volumes:
+      - wordpress_data:/var/www/html
+    ports:
+      - "8008:80"
+    depends_on:
+      - db
 volumes:
   db_data: {}
   wordpress_data: {}