instruction: Create a Dockerfile for storage
output: ```dockerfile
  from dockershim
  Generate Certificates Manually
  Manage Memory, CPU, and API Resources
  Configure Default Memory Requests and Limits for a Namespace
  Configure Default CPU Requests and Limits for a Namespace
  Configure Minimum and Maximum Memory Constraints for a Namespace
  Configure Minimum and Maximum CPU Constraints for a Namespace
  Configure Memory and CPU Quotas for a Namespace
  Configure a Pod Quota for a Namespace
  Install a Network Policy Provider
  Use Antrea for NetworkPolicy
  Use Calico for NetworkPolicy
  Use Cilium for NetworkPolicy
  Use Kube-router for NetworkPolicy
  Romana for NetworkPolicy
  Weave Net for NetworkPolicy
  Access Clusters Using the Kubernetes API
  Advertise Extended Resources for a Node
  Autoscale the DNS Service in a Cluster
  Change the Access Mode of a PersistentVolume to ReadWriteOncePod
  Change the default StorageClass
  Switching
  ```