based on: https://medium.com/@olahol/writing-real-time-web-apps-in-go-chat-4aa058644f73#.yc5jc2eme
- login page : localhost:5000
- room page : localhost:5000/room/username
based on: https://medium.com/@olahol/writing-real-time-web-apps-in-go-chat-4aa058644f73#.yc5jc2eme