Use MySQL custom settings on clean dev

Author: Dmitry Vakhrushev

docker-compose-clean.yml

@@ -16,5 +16,7 @@ cleandev:
    - db
 db:
   image: mysql:5.5
+  volumes:
+  - "./provision/docker/mysql:/etc/mysql/conf.d"
   environment:
   - MYSQL_ROOT_PASSWORD=root