code: func (p *HelloWorld) Init() error {
  	p.Log.Debug("Loading config..")
  	// Load config file.
  	cfg := defaultConfig()
  	found, err := p.Cfg.LoadValue(cfg)
  	if err != nil {
  		return err
  	} else if !found {
  		p.Log.Warnf("config not found")
  	}
  
  	p.Log.Info(cfg.Greeting)
  	return nil
  }
docs: // Init is executed on agent initialization.