How to deploy Ember.js/Node.js/MongoDB application to Heroku?

I've just finished my application which uses Ember.js as a frontend framework, Node.js for my REST API and MongoDB as the default database. I'm trying to deploy the application to Heroku, but it doesn't seem to work properly. I have my Ember code in the folder ember-store and my API in ember-store/store-api. The app is deployed, but not functional when I open it up, Heroku gives me the following error: "An error occurred in the application and your page could not be served."

My node.js code looks like this:

const http = require('http'); // Import http package
const app = require('./app'); // Import app.js file from current directory

const port = process.env.PORT || 3000;

const server = http.createServer(app);

server.listen(port);

In my Ember application, I have the following adapters:

adapters/application.js

import RESTAdapter from '@ember-data/adapter/rest';

export default RESTAdapter.extend({
  namespace: 'api',
  host: 'http://localhost:3000'
});

adapters/order.js

import RESTAdapter from '@ember-data/adapter/rest';

export default RESTAdapter.extend({
  host: "http://localhost:3000",
});

adapters/product.js

import RESTAdapter from '@ember-data/adapter/rest';

export default RESTAdapter.extend({
  urlForFindAll() {
    return 'http://localhost:3000/products';
  },
});

I'm assuming I need to replace 'localhost:3000' in my adapters, but I don't think it's gonna resolve the issue. Is there a guide on how can I deploy it to Heroku(or anywhere else)? Any help would be greatly appreciated!