wp-docker-compose-stack

Build a custom docker-compose development stack for WordPress when wp-env's abstraction runs out — Redis object cache, Mailpit SMTP capture, custom PHP extensions (phpredis, Xdebug), php.ini overrides. Covers the official wordpress image's runtime-env config model (wp-config.php reads WORDPRESS_DB_* / WORDPRESS_CONFIG_EXTRA via getenv at request time, so every container sharing the volume — wp-cli included — needs the same environment, best shared via a YAML anchor), the mariadb healthcheck + service_healthy dependency, a wp-cli service as user 33:33, wiring the redis-cache plugin drop-in with WP_REDIS_HOST, why wp_mail silently fails (invalid wordpress@localhost From) and the phpmailer_init + Mailpit fix, pecl Dockerfiles for phpredis/Xdebug, and pinning image tags because wordpress:latest lags WP releases. Use when composing docker-compose.yml for WP, adding Redis/mail capture to local dev, or debugging a WP container where config env vars seem ignored.