https://www.youtube.com/watch?v=TUFZGJMCBU0
https://www.youtube.com/watch?v=glVR2zjq1j4
https://aws.amazon.com/blogs/devops/continuous-delivery-of-nested-aws-cloudformation-stacks-using-aws-codepipeline/
https://www.mabl.com/blog/how-to-setup-ci/cd-with-aws-codepipeline
https://aws.amazon.com/blogs/devops/continuous-delivery-of-nested-aws-cloudformation-stacks-using-aws-codepipeline/