A registered domain. Currently this domain is assumed to be registered with AWS.
Design
At its core this is simply a static website hosted in S3 and served by CloudFront. CloudFront does most of the heavy lifting, including caching.
An EventBridge schedule invokes a lambda every day. The lambda makes a call to Dezgo to generate an image with the passed in prompt and model; the prompt and model are configured via Terraform variables. The lambda then templates out a new latest.html and uploads everything to S3. Finally the lambda creates a CloudFront cache invalidation for latest.html and the generated image.