server.js

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

// Uncaught Exceptions like undefined variables
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');

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

mongoose
  .connect(DB, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  })
  .then((con) => {
    // console.log(con.connections);
    console.log('Db Connection successful');
  });

// LOCAL DATABASE
// mongoose
//   .connect(process.env.DATABASE_LOCAL, {
//     useNewUrlParser: true,
//     useCreateIndex: true,
//     useFindAndModify: false,
//     useUnifiedTopology: true,
//   })
//   .then(() => console.log('DB connection successful'))
//   .catch((err) => console.log('ERROR'));

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

// Handling unhandled events in asynchronous codes like a failed DB Connection
process.on('unhandledRejection', (err) => {
  console.log('UNHANDLER REJECTION! Shutting down...');
  console.log(err.name, err.messages);
  server.close(() => {
    process.exit(1);
  });
});