server.js

var express = require('express');
var app = express();
var cfenv = require('cfenv');
var bodyParser = require('body-parser');
const request = require('request');
const mongoose = require('mongoose');
const httpServer = require('http').createServer(app);
const io = require('socket.io')(httpServer);
const socket = require('./sockets');
const adminRouter = require('./router/adminRouter');
require('dotenv').config();

socket.openSocket(io, app);

//get routes
const routes = require('./router/routes');
app.use(routes);

//get the admin portal
app.use('/admin', adminRouter);

// parse application/x-www-form-urlencoded
app.use(express.urlencoded({ extended: true }));

// parse application/json
app.use(express.json());
//const uri = 'mongodb+srv://admin:admin@cluster0.5cdt0.mongodb.net/geodata?ssl=true&replicaSet=atlas-k8w5gq-shard-0&authSource=admin&retryWrites=true&w=majority'
const uri = `mongodb+srv://${process.env.DB_USERNAME}:${process.env.DB_PASSWORD}@${process.env.DB_CLUSTER}.mongodb.net/${process.env.DB_NAME}?ssl=true&replicaSet=atlas-k8w5gq-shard-0&authSource=admin&retryWrites=true&w=majority`;

//const uri = "mongodb://ray:1998@cluster0-shard-00-00.ho33k.mongodb.net:27017,cluster0-shard-00-01.ho33k.mongodb.net:27017,cluster0-shard-00-02.ho33k.mongodb.net:27017/test?ssl=true&replicaSet=atlas-k8w5gq-shard-0&authSource=admin&retryWrites=true&w=majority";
//mongoose.connect('mongodb+srv://admin:admin@cluster0.5cdt0.mongodb.net/geodata', {useNewUrlParser: true, useUnifiedTopology: true});
mongoose.connect(uri, { useNewUrlParser: true, useUnifiedTopology: true });

let db = mongoose.connection;

db.on('error', console.error.bind(console, 'MongoDB connection error'));
db.once('open', function () {
  // we're connected!
  console.log('database connected');
});

//serve static file (index.html, images, css)
app.use(express.static(__dirname + '/views'));
app.use('/success', express.static('./views/paymentSuccess.html'));
app.use('/cancel', express.static('./views/paymentCancel.html'));

//Host on port
var port = process.env.PORT || 3000;
httpServer.listen(port, function () {
  console.log(
    'To view your app, open this link in your browser: http://localhost:' + port
  );
});