scripts for backend code example

Example: scripts for the backend

"scripts": {
  "build": "rimraf dist && tsc",
  "preserve": "npm run build",
  "serve": "cross-env NODE_ENV=development concurrently \"tsc --watch\" \"nodemon -q dist/index.js\"",
  "prestart": "npm run build",
  "start": "cross-env NODE_ENV=production node dist/index.js",
  "test": "echo \"Error: no test specified\" && exit 1"
},