npm ERR! Please include the following file with any support request

Please someone tells me what is going wrong here with heroku app deployment?

2017-05-14T11:15:13.933406+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=web-shop-server.herokuapp.com request_id=6e445608-0eb3-49c9-8034-65a4af4af28b fwd="39.33.164.147" dyno= connect= service= status=503 bytes= protocol=https
Disconnected from log stream. There may be events happening that you do not see here! Attempting to reconnect...
2017-05-14T11:14:43.294593+00:00 app[web.1]: npm ERR!     npm bugs web-shop-admin
2017-05-14T11:14:43.294681+00:00 app[web.1]: npm ERR! Or if that isn't available, you can get their info via:
2017-05-14T11:14:43.294792+00:00 app[web.1]: npm ERR!     npm owner ls web-shop-admin
2017-05-14T11:14:43.321873+00:00 app[web.1]: 
2017-05-14T11:14:43.294878+00:00 app[web.1]: npm ERR! There is likely additional logging output above.
2017-05-14T11:14:43.322089+00:00 app[web.1]: npm ERR! Please include the following file with any support request:
2017-05-14T11:14:43.322182+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2017-05-14T11_14_43_298Z-debug.log
2017-05-14T11:14:43.404092+00:00 heroku[web.1]: State changed from starting to crashed
2017-05-14T11:14:43.390094+00:00 heroku[web.1]: Process exited with status 1

package.json

{
  "name": "web-shop-admin",
  "version": "1.0.0",
  "repository": {
    "type": "git",
    "url": "https://github.com/abc/xyz.git"
  },
  "description": "Web Shop Admin",
  "engines": {
    "node": "7.9.0"
  },
  "scripts": {
    "start": "node server.js"
  },
  "author": "Muhammad Shahzad",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.17.1",
    "connect-busboy": "0.0.2",
    "cors": "^2.8.3",
    "crypto": "0.0.3",
    "express": "^4.15.2",
    "express-jwt": "^5.3.0",
    "forever": "^0.15.3",
    "jsonwebtoken": "^7.3.0",
    "method-override": "^2.3.8",
    "mongodb": "^2.2.26",
    "multer": "^1.3.0",
    "serve-favicon": "^2.4.2"
  }
}

via Muhammad Shahzad