server.js

const dotenv = require('dotenv');

dotenv.config({ path: './config.env' });
const mongoose = require('mongoose');

process.on('uncaughtException', (err) => {
  console.log('Uncaught Exception Shutting down..');
  console.log(err.name, err.message);
  process.exit(1);
});

const app = require('./app');

const database =
  'mongodb+srv://Hiten14:<PASSWORD>@cluster0.uepjh.mongodb.net/natours?retryWrites=true&w=majority';
const DB = database.replace('<PASSWORD>', process.env.DATABASE_PASSWORD);
mongoose
  .connect(DB, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
    useUnifiedTopology: true,
  })
  .then(() => {
    console.log('DB connection successful!');
  });

const port = process.env.PORT || 3000;
const server = app.listen(port, () => {
  console.log(`Server running on ${port}...`);
});

process.on('unhandledRejection', (err) => {
  console.log('Unhandled Rejection Shutting down..');
  console.log(err.name, err.message);
  server.close(() => {
    process.exit(1);
  });
});

process.on('SIGTERM', () => {
  console.log('SIGTERM Shutting down...');
  server.close(() => {
    console.log('process terminated');
  });
});