$ npm install
# development
$ npm run start
# watch mode
$ npm run start:dev
# hot mode -> 但是注意webpack有一些支持不好的地方,比如GraphQL https://docs.nestjs.cn/8/recipes?id=%e7%83%ad%e9%87%8d%e8%bd%bd
$ npm run start:hot
# production mode
$ npm run start:prod
# unit tests
$ npm run test
# e2e tests
$ npm run test:e2e
# test coverage
$ npm run test:cov