load_template.go

func loadTemplate() *template.Template {
	templates, err := filepath.Glob("templates/*")
	if err != nil {
		log.Println(err)
	}
	t := template.Must(template.New("layout.go.html").ParseFiles(templates...))
	return t
}

func main() {
	// ...
	t := loadTemplate()
	writer := &strings.Builder{}
	err := t.Execute(writer, feeds)
	if err != nil {
		log.Fatalln(err)
	}
	// ...
}