Ecommerce Shopify WordPress Discussion

Docker wordpress and mysql : Warning: mysqli_real_connect(): (HY000/2002): No such file or directory in /var/www/html/wp-includes/class-wpdb.php

I am trying to setup a local website on my Mac with Docker and the following docker-composer.yml file: version: '3' services: db: platform: linux/x86_64 image: mysql:5.7 ports: - "3306:3306" volumes: - wordpress_db:/var/lib/mysql environment: MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD} MYSQL_DATABASE: ${MYSQL_DATABASE} MYSQL_USER: ${MYSQL_USER} MYSQL_PASSWORD: ${MYSQL_PASSWORD} wordpress: image: wordpress:php7.4-apache depends_on: - db ports: - "8000:80" volumes: - ./:/var/www/html environment: WORDPRESS_DB_HOST: db WORDPRESS_DB_USER: ${MYSQL_USER} WORDPRESS_DB_PASSWORD: ${MYSQL_PASSWORD} WORDPRESS_DB_NAME: ${MYSQL_DATABASE} volumes: wordpress_db: WORDPRESS DB constants are defined in a .env file. Running docker-composer up -d is OK, and I can enter my database using a GUI like Sequel Ace. But when I go to the website on http://localhost:8000 I get this error : Warning: mysqli_real_connect(): (HY000/2002): No such file or directory in /var/www/html/wp-includes/class-wpdb.php on line 1987 No such file or directory I tried switching localhost to 127.0.0.1 for the DB_HOST constant in the wp-config.php file but it does not work either. Instead of the "No such file or directory" message I get : Warning: mysqli_real_connect(): (HY000/2002): Connection refused in /var/www/html/wp-includes/class-wpdb.php on line 1987 Connection refused What hostname should I use for Wordpress to connect to the database?
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