code: func (ctrl Controller) Index(w http.ResponseWriter, req *http.Request) {
  	var (
  		Products []products.Product
  		tx       = utils.GetDB(req)
  	)
  
  	tx.Preload("Category").Find(&Products)
  
  	ctrl.View.Execute("index", map[string]interface{}{}, req, w)
  }
docs: // Index products index page