Update README.md

README.md

@@ -5,7 +5,7 @@ docker build -t girish/wordpress .
 
 Running
 =======
-docker run -tiP -e MYSQL_URL=<url> -v /tmp/data:/app/data girish/wordpress
+docker run -tiP --link mysql:mysql -e MYSQL_URL=<url> -v /tmp/data:/app/data girish/wordpress
 
 Notes
 =====