server.js

// eslint-disable-next-line import/no-extraneous-dependencies
const mongoose = require('mongoose');

const dotenv = require('dotenv');

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

process.on('uncaughtException', (err) => {
  console.log(err, 'UNCAUGHT EXCEPTION');
  process.exit(1);
});
const app = require('./app');

const DB = process.env.DATABASE.replace(
  '<PASSWORD>',
  process.env.DATABASE_PASSWORD,
);
mongoose
  .connect(DB, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
  })
  // eslint-disable-next-line no-console
  .then(() => console.log('Database Connected Successfully'));

// console.log(process.env);
const port = process.env.PORT || 3000;
const server = app.listen(port, () => {
  // eslint-disable-next-line no-console
  console.log(`Server is running on port ${port}`);
});

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

// for process.exit() 0 stands for rejection and 1 stands for uncaught exception