docker-compose file break line

  - WORDPRESS_DB_PASSWORD=xxxxxxxxxxxxxxx
  - WORDPRESS_DEBUG=1
  - WORDPRESS_CONFIG_EXTRA=

      define( 'WP_REDIS_CLIENT', 'predis' );

      define( 'WP_REDIS_SCHEME', 'tcp' );

      define( 'WP_REDIS_HOST', 'redis' );

      define( 'WP_REDIS_PORT', '6379' );

      define( 'WP_REDIS_PASSWORD', 'xxxxxxxxxxxxxxx' );

      define( 'WP_REDIS_DATABASE', '0' );

      define( 'WP_REDIS_MAXTTL', '21600' );

      define( 'WP_CACHE_KEY_SALT', 'xx_ ');

      define( 'WP_REDIS_SELECTIVE_FLUSH', 'xx_ ');

      define( 'WP_AUTO_UPDATE_CORE', false );
volumes:
  - ./wordpress:/var/www/html