Error establishing a database connection about wuxt HOT 7 CLOSED

wp.wuxt:
    container_name: wp.wuxt
    image: wordpress:5.1.1-php7.2-apache
    volumes:
      - ./wp-content:/var/www/html/wp-content
    expose:
      - '3080'
    ports:
      - '3080:80'
    environment:
      WORDPRESS_DB_HOST: mysql.wuxt:3306
      WORDPRESS_DB_NAME: wuxt
      WORDPRESS_DB_USER: root
      WORDPRESS_DB_PASSWORD: dev
    networks:
      - default

Starting front.wuxt ... done
Starting mysql.wuxt ... done
Starting wp.wuxt    ... done

Error establishing a database connection
This either means that the username and password information in your wp-config.php file is incorrect or we can’t contact the database server at mysql.wuxt:3306. This could mean your host’s database server is down.

services:
    mysql.wuxt:
        container_name: mysql.wuxt
        image: mysql:5.7
        volumes:
            - ./_db:/var/lib/mysql
        environment:
            MYSQL_ROOT_PASSWORD: dev
        networks:
          - default

    wp.wuxt:
        container_name: wp.wuxt
        image: wordpress:5.2.2-php7.2-apache
        volumes:
          - ./wp-content:/var/www/html/wp-content
        expose:
          - '3080'
        ports:
          - '3080:80'
        environment:
          WORDPRESS_DB_HOST: mysql.wuxt:3306
          WORDPRESS_DB_NAME: wuxt
          WORDPRESS_DB_USER: root
          WORDPRESS_DB_PASSWORD: dev
        networks:
          - default

    front.wuxt:
        container_name: front.wuxt
        image: node:11-slim
        working_dir: '/var/www/app'
        environment:
            - HOST=0.0.0.0
        ports:
            - '3000:3000'
        volumes:
            - ./nuxt:/var/www/app
        command: bash -c "yarn install && yarn dev"
        networks:
          - default

networks:
    default:

[Note] mysqld (mysqld 5.7.26) starting as process 1 ...
[Note] InnoDB: PUNCH HOLE support available
[Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
[Note] InnoDB: Uses event mutexes
[Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
[Note] InnoDB: Compressed tables use zlib 1.2.11
[Note] InnoDB: Using Linux native AIO
[Note] InnoDB: Number of pools: 1
[Note] mysqld (mysqld 5.7.26) starting as process 1 ...
[Note] InnoDB: Using CPU crc32 instructions
[Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
[Note] InnoDB: Completed initialization of buffer pool
[Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
[Note] InnoDB: Highest supported file format is Barracuda.
[Note] InnoDB: Creating shared tablespace for temporary tables
[Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
[Note] InnoDB: File './ibtmp1' size is now 12 MB.
[Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
[Note] InnoDB: 32 non-redo rollback segment(s) are active.
[Note] InnoDB: Waiting for purge to start
[Note] InnoDB: 5.7.26 started; log sequence number 2530624
[Note] Plugin 'FEDERATED' is disabled.
[Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
[Warning] World-writable config file './auto.cnf' is ignored.
[Warning] World-writable config file './ [Note] Salting uuid generator variables, current_pid: 1, server_start_time: 1561669396, bytes_sent: 0, 
[Note] Generated uuid: 'fc18f421-991e-11e9-896f-0242ac120003', server_start_time: 281476538380053, bytes_sent: 94390283916320
[Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: fc18f421-991e-11e9-896f-0242ac120003.
[Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them.
[Warning] CA certificate ca.pem is self signed.
[Note] InnoDB: Buffer pool(s) load completed at 190627 21:03:16
[Note] Server hostname (bind-address): '*'; port: 3306
[Note] IPv6 is available.
[Note]   - '::' resolves to '::';
[Note] Server socket created on IP: '::'.
[Warning] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
[Note] Event Scheduler: Loaded 0 events
[Note] mysqld: ready for connections.
Version: '5.7.26'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  MySQL Community Server (GPL)