CRI dockerd in EKS

When Amazon EKS ended support for dockershim (which enables the use of Docker Engine with Kubernetes), we moved our default AMIs to use containerd as the container runtime. https://docs.aws.amazon.com/eks/latest/userguide/dockershim-deprecation.html. For most use cases, this switch should have little effect on applications. So containerd is my suggestion as an alternative rather than using an alternative shim to support Docker Engine.