Custom Domain REST API with Lambda and Request Authorizer Overview This SOP deploys a REST API with a Regional custom domain name, a Lambda backend function, and a request-based Lambda authorizer. It handles ACM certificate provisioning, IAM role creation, Lambda function deployment, API Gateway REST API creation with a custom authorizer, custom domain configuration, base path mapping, and Route 53 DNS setup. The architecture includes: - An API Gateway REST API with an endpoint type of REGIONAL - A request-based Lambda authorizer that validates headers, query string parameters, and stage vari…