추천 Tutorial 페이지

https://codersera.com/blog/typeorm-with-nest-js-tutorial/

- dto, 관계, 기본 삽입 예제

https://jasonwatmore.com/post/2020/08/18/nodejs-mysql-simple-api-for-authentication-registration-and-user-management#validate-request-js

- login, joi 활용 validation 예제, express crud 예제

https://medium.com/@romain.kelifa/easy-validation-with-nest-js-and-joi-eb18403b46cc

- joi validation 예제