code: func ReadPath(path string) ([]byte, error) {
  	if path == "" {
  		return nil, trace.NotFound("empty path")
  	}
  	s, err := filepath.Abs(path)
  	if err != nil {
  		return nil, trace.ConvertSystemError(err)
  	}
  	abs, err := filepath.EvalSymlinks(s)
  	if err != nil {
  		return nil, trace.ConvertSystemError(err)
  	}
  	bytes, err := ioutil.ReadFile(abs)
  	if err != nil {
  		return nil, trace.ConvertSystemError(err)
  	}
  	return bytes, nil
  }
docs: // ReadPath reads file contents