A solutions architect is designing a solution where users will be directed to a backup static error page if the primary website is unavailable. The primary webs...

A solutions architect is designing a solution where users will be directed to a backup static error page if the primary website is unavailable. The primary website'sDNS records are hosted in Amazon Route 53 where their domain is pointing to an Application Load Balancer (ALB).
Which configuration should the solutions architect use to meet the company's needs while minimizing changes and infrastructure overhead?