Route53 Active Passive Failover

Hi AWS, I have a .NET Windows service and web app running on EC2 Windows server. I have to deploy them in active passive failover mode such that if one server goes down the web app and service will actively run on the other server avoiding downtime. I have implemented CI/CD pipeline for the Windows Service application but the issue is instead of running on one server at a time it is running on both the servers which is not appropriate as per my requirements.

I know that I need to update the URL in order to access the web app URL but I am not sure what to do and how to do. This is the follow up question for the issue I raised a couple of days back https://repost.aws/questions/QUN4ajf-bNQFCpAzkCW1m46A/deploy-a-ci-cd-pipeline-with-dns-failover-active-passive

Can someone from Route53 or AWS team will help me on this?