$ docker run --name some-wordpress -e WORDPRESS_DB_HOST=10.1.2.3:3306  -e WORDPRESS_DB_USER=... -e WORDPRESS_DB_PASSWORD=... -d wordpress

vagrant@docker-blogs:/vagrant$ docker logs je-wordpress
WordPress not found in /var/www/html - copying now...
Complete! WordPress has been successfully copied to /var/www/html

Warning: mysqli::mysqli(): (HY000/2002): Connection refused in - on line 10

MySQL Connection Error: (2002) Connection refused

Warning: mysqli::mysqli(): (HY000/2002): Connection refused in - on line 10

MySQL Connection Error: (2002) Connection refused