Devops k8s autoscaling stuff

• https://m.signalvnoise.com/running-spot-instances-effectively-with-amazon-eks/
• https://www.doit-intl.com/running-eks-workloads-on-spot-instances-with-on-demand-instances-fallback/
• https://aws.amazon.com/ec2/spot/instance-advisor/
• https://itnext.io/the-definitive-guide-to-running-ec2-spot-instances-as-kubernetes-worker-nodes-68ef2095e767