Update docker file to be PSP friendly

[patpicos]

Please update docker image to run as a non-root user

Events:
  Type     Reason     Age                From                                        Message
  ----     ------     ----               ----                                        -------
  Normal   Scheduled  15s                default-scheduler                           Successfully assigned patpicos/captureorder-d47ff8794-nsrhg to aks-agentpool-22059577-vmss000001
  Normal   Pulling    13s (x2 over 14s)  kubelet, aks-agentpool-22059577-vmss000001  Pulling image "azch/captureorder"
  Normal   Pulled     12s (x2 over 14s)  kubelet, aks-agentpool-22059577-vmss000001  Successfully pulled image "azch/captureorder"
  Normal   Created    12s (x2 over 13s)  kubelet, aks-agentpool-22059577-vmss000001  Created container captureorder
  Warning  Failed     12s (x2 over 13s)  kubelet, aks-agentpool-22059577-vmss000001  Error: failed to start container "captureorder": Error response from daemon: OCI runtime create failed: container_linux.go:345: starting container process caused "chdir to cwd (\"/root\") set in config.json failed: permission denied": unknown
  Warning  BackOff    8s                 kubelet, aks-agentpool-22059577-vmss000001  Back-off restarting failed container