$ npm install
# development
$ npm run start
# watch mode
$ npm run start:dev
# production mode
$ npm run start:prod
create .env.development.local (use .env.example as an example)
database design: https://drive.google.com/file/d/1qXvl0ulFKPTHuBTrD5qq3TKriOmkIguv/view?usp=sharing