How to Run React JS Build Locally

You have to install server package then you can run reactjs build into your pc.

npm install -g serve
# Or if you're using Yarn
yarn global add serve

All that’s left to do is tell serve the package which folder you want to serve. Assuming you're inside your project directory. You'd run a command like this.

serve build
And you should see the following output, specifying where your React app is being served.