5.1. Edit the file src/App.js by changing the <DNS_NAME_CLOUDFRONT> with to your own CloudFront domain name and save the file.
5.2. Publish your React application.
5.3. Now test in your browser the application to see the messages
https://cloudfront-domain-name/, you will see the messages from backend.
Congratulations!!!! Now you have a React Application stored on Amazon S3 and a Nodejs backend using containers with Amazon ECS.