IV. Backing services

[Bogay]

Treat backing services as attached resources

https://12factor.net/backing-services

[Bogay]

這點雖然是符合，後端可以在 config 裡面設定 DB 連線資訊，但不曉得是否真的需要嘗試開個 DynamoDB 之類的去證明可以換？

The code for a twelve-factor app makes no distinction between local and third party services. To the app, both are attached resources, accessed via a URL or other locator/credentials stored in the config. A deploy of the twelve-factor app should be able to swap out a local MySQL database with one managed by a third party (such as Amazon RDS) without any changes to the app’s code.