code: log error if http server does not go online

code/main.go

@@ -39,5 +39,8 @@ func main() {
 	http.HandleFunc("/websocket", websocketConnection)
 	http.Handle("/", http.FileServer(http.Dir("./static")))
 
-	http.ListenAndServe(":8080", nil)
+	err := http.ListenAndServe(":8080", nil)
+	if err != nil {
+		fmt.Errorf("Server could not start up: %s", err.Error())
+	}
 }