มาลองใช้ Cloud Firestore ด้วยกันนะ (สำหรับมือใหม่ — อ่านจบ Code ได้!!!)
https://blog.foxbith.com/%E0%B8%A1%E0%B8%B2%E0%B8%A5%E0%B8%AD%E0%B8%87%E0%B9%83%E0%B8%8A%E0%B9%89-cloud-firestore-%E0%B8%94%E0%B9%89%E0%B8%A7%E0%B8%A2%E0%B8%81%E0%B8%B1%E0%B8%99%E0%B8%99%E0%B8%B0-%E0%B8%AA%E0%B8%B3%E0%B8%AB%E0%B8%A3%E0%B8%B1%E0%B8%9A%E0%B8%A1%E0%B8%B7%E0%B8%AD%E0%B9%83%E0%B8%AB%E0%B8%A1%E0%B9%88-%E0%B8%AD%E0%B9%88%E0%B8%B2%E0%B8%99%E0%B8%88%E0%B8%9A-code-%E0%B9%84%E0%B8%94%E0%B9%89-e3cbd2cbeba8