Enha: state to hold room_id instead of whole room

main.go

@@ -23,6 +23,7 @@ func ListenToRequests(port string) error {
 	mux.HandleFunc("GET /", handlers.HandleHome)
 	mux.HandleFunc("POST /login", handlers.HandleFrontLogin)
 	mux.HandleFunc("GET /room", handlers.HandleRoomEnter)
+	mux.HandleFunc("GET /join-team", handlers.HandleJoinTeam)
 	//elements
 	mux.HandleFunc("GET /room/createform", handlers.HandleShowCreateForm)
 	mux.HandleFunc("GET /room/hideform", handlers.HandleHideCreateForm)