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);
});

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

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

mongoose
  .connect(DB, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
    useUnifiedTopology: true,
  })
  .then((con) => {
    //console.log(con.connections);
    console.log('DB connection is successful');
  });

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

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