add middleware for request logging

golang/cmd/frontend/main.go

@@ -25,10 +25,10 @@ func main() {
 
 	// start web server
 	server := http.Server{
-		Addr:    ":80",
+		Addr:    ":8080",
 		Handler: app.routes(),
 	}
 
-	log.Println("server started, listening on :80")
+	log.Println("server started, listening on :8080")
 	server.ListenAndServe()
 }