Listen to all addresses, not just localhost

cmd/numerus/main.go

@@ -22,7 +22,7 @@ func main() {
 	defer dbpool.Close()
 
 	srv := http.Server{
-		Addr:         "localhost:8080",
+		Addr:         ":8080",
 		Handler:      router.NewRouter(dbpool),
 		ReadTimeout:  5 * time.Second,
 		WriteTimeout: 10 * time.Second,