code: func OpenFile(path string) error {
  	logFilePath = path
  
  	var err error
  	logFile, err = os.OpenFile(logFilePath, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
  	if err != nil {
  		return err
  	}
  
  	SetOutput(logFile)
  	return nil
  }
docs: // OpenFile opens the log file using the specified path