Demo: https://amazonaapp.herokuapp.com

Step 1. Add this folder to git repository

$ git init

Step 2. Create heroku account at https://heroku.com

Step 3. Install Heroku CLI at https://devcenter.heroku.com/articles/heroku-cli

Step 4. Login to Heroku

$ heroku login

Step 5. Create Heroku app

$ heroku apps:create amazonaapp

Step 6. Edit package.json

   "scripts": {
    "start": "node dist/server.js",
    "dev": "nodemon --exec babel-node backend/server.js",
    "build": "rm -rf dist && babel backend -d dist",
    "heroku-postbuild": "npm run build && cd frontend && npm install && npm run build"
  },

Step 7. Update server port in backend/server.js

const port = process.env.PORT || 5000;
app.listen(port, () =>
  console.log("Server serves at http://localhost:" + port)
);

Step 8. Push to Heroku

$ git add .
$ git commit -m "message"
$ git push heroku master

Step 1. Create account on https://www.mongodb.com/cloud

Step 2. Login to https://cloud.mongodb.com/

Step 3. Add database user

• Select Security > Database Access on left sidebar
• Select Add New User button
• Enter user name and password and click Add User

Step 4. Add ip whitelist

• Select Security > Network Access on left sidebar
• Select Add IP Address
• Enter 0.0.0.0/0 in Whitelist Entry and click Confirm

Step 5. Get connection string

• Select Altas > Cluster on left sidebar
• Click Connect
• Click Connect to your application
• Click Copy button

Step 6. Set connection string in Heroku

• Open Heroku apps https://dashboard.heroku.com/apps/
• Select your apps
• Open Setting Tab
• Click Reveal Config Vars
• Enter Key as MONGODB_URL
• Enter Value from copied connection string

Step 7. Set connection string in backend/server.js

const mongodbUrl = process.env.MONGODB_URL || "mongodb://localhost/amazona";