increase wrtie timeout to allow long exports

backend/app/rest/api/rest.go

@@ -147,7 +147,7 @@ func (s *Rest) makeHTTPServer(port int, router http.Handler) *http.Server {
 		Addr:              fmt.Sprintf(":%d", port),
 		Handler:           router,
 		ReadHeaderTimeout: 5 * time.Second,
-		WriteTimeout:      5 * time.Second,
+		WriteTimeout:      120 * time.Second, // TODO: such a long timeout needed for blocking export (backup) request
 		IdleTimeout:       30 * time.Second,
 	}
 }