运行 php artisan migrate:fresh 时出现此错误：

#15 0.576    Illuminate\Database\QueryException 
#15 0.576   SQLSTATE[HY000] [2002] No such file or directory (SQL: SHOW FULL TABLES WHERE table_type = 'BASE TABLE')

我的 docker-compose.yml：

version: "3.7"

networks:
  app-network:
    driver: bridge

services:
  app:
    build:
      context: ./
      dockerfile: Dockerfile
    image: laravel8-php-fpm-80
    container_name: app
    restart: unless-stopped
    tty: true
    working_dir: /var/www
    volumes:
      - ./:/var/www
    networks:
      - app-network

  db:
    image: mysql:5.7.33
    container_name: db
    restart: unless-stopped
    tty: true
    environment:
      MYSQL_DATABASE: ${DB_DATABASE}
      MYSQL_ROOT_PASSWORD: ${DB_PASSWORD}
      MYSQL_PASSWORD: ${DB_PASSWORD}
      MYSQL_USER: ${DB_USERNAME}
      SERVICE_TAGS: dev
      SERVICE_NAME: db
    volumes:
      - ./mysql/data:/var/lib/mysql
    networks:
      - app-network

  nginx:
    image: nginx:1.19.8-alpine
    container_name: nginx
    restart: unless-stopped
    tty: true
    ports:
      - 8100:80
    volumes:
      - ./src:/var/www
      - ./nginx/conf:/etc/nginx/conf.d
    networks:
      - app-network

我的 Dockerfile：

FROM php:8.0.3-fpm-buster

RUN docker-php-ext-install bcmath pdo_mysql

RUN apt-get update
RUN apt-get install -y git zip unzip
COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
COPY . /var/www
WORKDIR /var/www
RUN composer install
RUN php artisan config:clear
RUN php artisan migrate:fresh

EXPOSE 9000

我的环境文件：

APP_NAME=App Name
APP_ENV=local
APP_KEY=base64:1XGhFF8+2qNi2IPyQVgdv783pZqTgsUl4Y77K9gUoYY=
APP_DEBUG=true
APP_URL=http://localhost

LOG_CHANNEL=stack

DB_CONNECTION=mysql
DB_HOST=db
DB_PORT=3306
DB_DATABASE=db_name
DB_USERNAME=root
DB_PASSWORD=123456

BROADCAST_DRIVER=log
CACHE_DRIVER=file
QUEUE_CONNECTION=sync
SESSION_DRIVER=file
SESSION_LIFETIME=120

REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379

MAIL_MAILER=smtp
MAIL_HOST=smtp.mailtrap.io
MAIL_PORT=2525
MAIL_USERNAME=null
MAIL_PASSWORD=null
MAIL_ENCRYPTION=null
MAIL_FROM_ADDRESS=null
MAIL_FROM_NAME="${APP_NAME}"

AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_DEFAULT_REGION=us-east-1
AWS_BUCKET=

PUSHER_APP_ID=
PUSHER_APP_KEY=
PUSHER_APP_SECRET=
PUSHER_APP_CLUSTER=mt1

MIX_PUSHER_APP_KEY="${PUSHER_APP_KEY}"
MIX_PUSHER_APP_CLUSTER="${PUSHER_APP_CLUSTER}"

在我的 config/database.php 我得到：

'mysql' => [
            'driver' => 'mysql',
            'url' => env('DATABASE_URL'),
            'host' => env('DB_HOST', '127.0.0.1'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', 'forge'),
            'unix_socket' => env('DB_SOCKET', ''),
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'prefix_indexes' => true,
            'strict' => true,
            'engine' => null,
            'options' => extension_loaded('pdo_mysql') ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
            ]) : [],
        ],

我是码头工人的新手，所以也许我错过了一些东西。有谁知道这里可能是什么问题:(我花了两天时间调查这个错误并没有找到任何好的答案