Update README.md

Author: dudash

README.md

@@ -56,7 +56,7 @@ Expose our app to outside the cluster
 > `oc expose service openshift-highscores-phaser-ui`
 
 ### Other Notes
-* `API_SERVER_URL` and `API_SERVER_WEBSOCKET_URL` can use `https` and `wss` as long as they a both set to be secure
+* `API_SERVER_URL` and `API_SERVER_WEBSOCKET_URL` can use `https` and `wss` as long as they a both set to be secure (use port 443)
 
 ## Credit & Thanks
 Thanks to Richard Davey @ Phaser for the [tutorials here](https://phaser.io/learn/community-tutorials) that this was initially based upon.