$ npm install# development
$ npm run start
# watch mode
$ npm run start:dev
# production mode
$ npm run start:prod#app
$ sudo apt-get install apache2-utils
$ npm run start:dev
$ nest start sub-project --watch
#run
$ ab -n 20 -c 10 http://localhost:3000/1
# unit tests
$ npm run test
# e2e tests
$ npm run test:e2e
# test coverage
$ npm run test:cov