text: /*
  start nestjs:
  sudo npm i -g @nestjs/cli
  nest new hello-nestjs
  npm run start
  */
  
  /*
  nest generate module try1
  nest generate controller try1
  nest generate service try1
  all requests started with localhost:3000/try1/
  */
  
  /*
  sudo npm install --save @nestjs/typeorm typeorm mysql
  agar database vojud nadashte bashad error migirim
  ama agar jadval vojud nadashte bashad khodkar sakhte khahad shod
  */