Idea: GitLab CI/CD template for AWS Amplify

AWS Amplify is a BaaS (backend as a service) provider used by a lot of teams to deploy mobile apps. We should have a CI/CD template that helps folks deploy to Amplify.

Details

Learn more about using Amplify with CI systems here: https://aws.amazon.com/blogs/mobile/complete-guide-to-full-stack-ci-cd-workflows-with-aws-amplify/