code: func (d *DockerHelper) LogError() {
  	if !d.errStats.hasError() {
  		fmt.Fprintf(os.Stderr, "[Error] %s %s\n", time.Now(), d.errStats.stats())
  	}
  	d.errStats = newErrorStats()
  }
docs: // LogError logs all the docker operation errors to stderr and clear current errors
  // TODO(random-liu): Print configuration and errors to stdout, and benchmark result to files