server.js

const mongoose = require('mongoose');
const dotenv = require('dotenv');

process.on('uncaughtException', (err) => {
  console.log('UNCAUGHT EXCEPTION! 💥 Shutting down...');
  console.log(err.name, err.message);
  process.exit(1);
});

dotenv.config({
  path: './.env',
});

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

let DB = process.env.DATABASE.replace(
  '<PASSWORD>',
  process.env.DATABASE_PASSWORD
);
if (process.env.NODE_ENV !== 'production') {
  DB = process.env.DATABASE_LOCAL;
}

mongoose
  .connect(DB, { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => console.log('DB connection successful!'));

const port = process.env.PORT || 3500;
const server = app.listen(port, () => {
  console.log(`App running on port ${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 Received. Shutting down gracefully!');
  server.close(() => {
    console.log('Process terminated by SIGTERM!');
  });
});