Change logs:
- Remove USER in Dockerfile #109
Images:
- k8s.gcr.io/cpa/cluster-proportional-autoscaler:1.8.4
- k8s.gcr.io/cpa/cluster-proportional-autoscaler-amd64:1.8.4
- k8s.gcr.io/cpa/cluster-proportional-autoscaler-arm:1.8.4
- k8s.gcr.io/cpa/cluster-proportional-autoscaler-arm64:1.8.4
- k8s.gcr.io/cpa/cluster-proportional-autoscaler-ppc64le:1.8.4