Lambda gradual deploy example, with automated roll back

[dave-graham]

:rocket: Feature Request

Description

Is there any chance you could create a lambda based example of gradual deploys with automated roll back if there are issues?

Proposed Solution

The key functionality is available in https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/automating-updates-to-serverless-apps.html but I would love to be able to use CDK instead. It allows canary deploys and an automated roll back if error levels trigger a cloudwatch alert.