Calling Google AppScript web app from cloud functions for Firebase

I am trying to get my cloud functions for Firebase to call a simple web app deployed with Google Apps Script. Can someone point to some example or help figure out what is the cause of the error in my code below. I really appreciate your help.

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I've created a simple webapp with Google Apps Script.

function doGet() {
   return ContentService.createTextOutput('Hello world');
}

      

        
        
        
      

    

And I am calling this using request-request in my Firebase Cloud Function. I tried to be as close as possible to the Google Translate example listed for cloud features. However, I am getting the following error when calling the Cloud function.

RequestError: Error: getaddrinfo ENOTFOUND script.google.com 
script.google.com:443

      

        
        
        
      

    

Here is my cloud function code -

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
const request = require('request-promise');

exports.makeUppercase = 
functions.database.ref('/users/{userid}/logs/{logid}/mykey')
.onWrite(event => {

  var url = `https://script.google.com/macros/s/.../exec`;
  var retstr = request(url, {resolveWithFullResponse: true}).then(
  response => {
    if (response.statusCode === 200) {
      const data = response.body;
      return event.data.ref.parent.child('uppercase').set(data);
    }
    throw response.body;
  });
});

      

        
        
        
      

    

Thanks in advance,

Rahul's relationship