I use the documentation a lot in this course. Here are all the links that are visited during this section. I recommended you read through them in your own time, as I judge them to have some importance for your understanding of the services and the exam. Happy reading!
CloudFormation:
Beanstalk
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/eb-cli3-install-advanced.html
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/ebextensions-optionsettings.html
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/environment-resources.html
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_docker_v2config.html
Lambda:
Step Functions
API Gateway
https://aws.amazon.com/blogs/compute/introducing-amazon-api-gateway-private-endpoints/
https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-request-throttling.html
https://docs.aws.amazon.com/step-functions/latest/dg/tutorial-api-gateway.html
ECS
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service-auto-scaling.html
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/using_awslogs.html
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/using_cloudwatch_logs.html
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs-cd-pipeline.html
https://docs.aws.amazon.com/codepipeline/latest/userguide/tutorials-ecs-ecr-codedeploy.html
Opsworks