as I described above, 
 for the first time, my creat-react-app project has no problem after it has been deployed with serve-s. 
 the files under the build generated by the second, npm run build, I re-enter and deploy with the serve-s command, but when I open the test, it is still the first version of serve-s build. 
 has any great advice on how to close serve, or how to update the build project for serve. 
