mysql orm sequalize migration

migration 사용한 레퍼런스 코드:

https://github.com/lsy26499/im-sprint-database-orm-reference

 

migration 튜토리얼:

https://medium.com/graphql-seoul/%EB%B2%88%EC%97%AD-%EB%A7%88%EC%9D%B4%EA%B7%B8%EB%A0%88%EC%9D%B4%EC%85%98%EA%B3%BC-sequelize-cli-%ED%8A%9C%ED%86%A0%EB%A6%AC%EC%96%BC-3926c0a9eae6