ASK - Node.js lifecycle

const express = require('express');
const http = require('http');
const { Client } = require('pg');

const app = express();
const server = http.createServer(app);

// Connect and get data from DB
const client = new Client({
  connectionString: '<CONNECTION>'
});

client.connect();

client.query('SELECT * FROM tb_name', function(err, results) {
  // Results
});

// Creating object that accept options from DB
const object = new MyObject({ optionFromDB });

object.on('ready', () => {
  // Do something when ready
});

server.listen(8000);