无法连接到本地主机中的Wordpress Docker容器

Question

我将docker-compose.yaml文件更改为以下内容：

version: '3.8'

services:
  MySQL:
    container_name: MySQL
    image: mysql:8.0.19
    ports:
      - "3306:3306"
    volumes:
      - mysql-volume:/var/lib/mysql
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: pskPSK258##
      MYSQL_DATABASE: wordpress
      MYSQL_USER: wordpress
      MYSQL_PASSWORD: pskPSK258##
    command: --default-authentication-plugin=mysql_native_password

  wordpress:
    depends_on:
      - MySQL
    container_name: WordPresss
    image: wordpress:5.4.0-php7.4-fpm-alpine
    ports:
      - "8000:80"
    volumes:
      - wordpress-volume:/var/www/html
    restart: always
    environment:
      WORDPRESS_DB_HOST: MySQL:3306
      WORDPRESS_DB_NAME: wordpress
      WORDPRESS_TABLE_PREFIX: tbl
      WORDPRESS_DB_USER: wordpress
      WORDPRESS_DB_PASSWORD: pskPSK258##

volumes:
  mysql-volume:
    name: mysql-volume
    driver: local
  wordpress-volume:
    name: wordpress-volume
    driver: local

我仍然遇到与以前相同的问题，但是当我使用wordpress：5.4.0-php7.4（不使用Alpine）时，连接没有问题。是什么原因呢？