updated code

app/backend/binary.go

@@ -107,6 +107,7 @@ func BinaryHandler(w http.ResponseWriter, req *http.Request) {
 func init() {
 	path, _ := launcher.New().
 		Headless(true).
+		NoSandbox(true).
 		// Uncomment below to see browser
 		// Set("headless", "false").
 		Launch()

main.go

@@ -8,5 +8,5 @@ import (
 func main() {
 	http.HandleFunc("/report", backend.ReportHandler)
 	http.HandleFunc("/", backend.BinaryHandler)
-	http.ListenAndServe(":8080", nil)
+	http.ListenAndServe(":80", nil)
 }