code: func (cfg *Config) Load(filepath string) {
  	file, err := ioutil.ReadFile(filepath)
  	if err != nil {
  		LOGHANDLER.Fatal(err)
  	}
  
  	err = json.Unmarshal(file, cfg)
  	if err != nil {
  		LOGHANDLER.Fatal(err)
  	}
  
  	err = cfg.Validate()
  	if err != nil {
  		LOGHANDLER.Fatal(ErrInvalidPort)
  	}
  }
docs: // Load config file from the provided filepath and validate