The document discusses using Amazon ECS (Elastic Container Service) to easily run Docker containers on AWS. It introduces key ECS concepts like clusters, container instances, services, tasks and task definitions. It then demonstrates how to use the UFO tool to build a Docker image, register an ECS task definition and deploy a containerized application to ECS with one command. The document concludes by reviewing the UFO demo and discussing how ECS can save costs by using EC2 A1 instances and Spot Fleets.