[NestJS][TypeOrm] Some first note

Desc: Some note when using TypeOrm in NestJS app

1. Active Records vs Data Mapper Patterns

In this seriese we gonna use Data Mapper. (It more familiar with other tools, like mongo/mongoose, when it follow the Repository patterns)

This post is imported from: https://thebrownbox.hashnode.dev/nestjstypeorm-some-first-note