code: func ReadBytesFromFile(pth string) ([]byte, error) {
  	if isExists, err := pathutil.IsPathExists(pth); err != nil {
  		return []byte{}, err
  	} else if !isExists {
  		return []byte{}, fmt.Errorf("No file found at path: %s", pth)
  	}
  
  	bytes, err := ioutil.ReadFile(pth)
  	if err != nil {
  		return []byte{}, err
  	}
  	return bytes, nil
  }
docs: // ReadBytesFromFile ...