server.js

const mongoose = require('mongoose');

process.on('uncaughtException', (err) => {
  console.log('UNCAUGHT EXCEPTION');
  console.log(err.name, err.message);
  process.exit(1);
});
// load env config
const dotenv = require('dotenv');
dotenv.config({ path: './config.env' });

// load express application
const app = require('./app');

// connect to mongodb
const DB = process.env.DATABASE.replace(
  '<PASSWORD>',
  process.env.DATABASE_PASSWORD
);

async function dbConnect() {
  await mongoose.connect(DB).then(() => {
    console.log('Database connected!');
  });
}
dbConnect().catch((err) => console.log(err));

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

process.on('unhandledRejection', (err) => {
  console.log('UNHANDLED REJECTION');
  console.log(err.name, err.message);
  server.close(() => {
    process.exit(1);
  });
});