add middleware stack

src/cmd/frontend/main.go

@@ -19,10 +19,15 @@ func main() {
 	// define app
 	webapp := app.NewApp(db)
 
+	// create middle
+	stack := middleware.CreateStack(
+		middleware.Logging,
+	)
+
 	// start web server
 	server := http.Server{
 		Addr:    ":8080",
-		Handler: middleware.Logging(webapp.Routes()),
+		Handler: stack(webapp.Routes()),
 	}
 
 	log.Println("server started, listening on :8080")