[doc] update readme

README.md

 
 [supervisor]
 scheme = https
-host = supervision-test.gteo.fr:8081
+host = supervision-test.gteo.fr
+port = 8081
 post_path = /Symfony/web/app_dev.php/boardws/insert
 get_path = /Symfony/web/app_dev.php/boardws/orders
 interval = 10000