AWS CloudFront origin failover

• https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/high_availability_origin_failover.html

• AWS CloudFront, distributions, Invalidations, Amazon CloudFront Ready, aws cloudfront, CloudFront Functions, Lambda@Edge, Origin Shield, Signed URL, OAI, Origin Access Control (OAC), Amazon CloudFront edge locations, cloudfront.net, invalidations, CloudFront Security Savings Bundle (CFSSB)