Migrate to Elastic Kubernetes Service (EKS)

[rstata]

Kubernetes is a fast-growing, widely-adopted application management fabric that functionally is equivalent to ECS. EKS is a managed Kubernetes service provided by AWS. It would've been better to have done the class using EKS, but it wasn't available when we started preparing the labs. (We do use docker-compose for deployment, which works well with Kubernetes, so the migration to EKS should be simple.)