Files for deploying Node.JS to Heroku

package-lock.json

(automatically generated from npm)

package.json

{
  "name": "my-app",
  "engines": {
    "node": "~9.3.0",
    "npm": "~5.5.1",
    "yarn": "~1.3.2"
  },
  "scripts": {
    "heroku-postbuild": "npm run build",
    "build": <compile ES6, Babel, Ts, whatever...>
  }
}