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

const DB = process.env.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(`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);
    })
})