Server.js

'use strict';

let helmet = require('helmet');
let cors = require('cors');
let createError = require('http-errors');
let logger = require('morgan');
let express = require('express');

// Environment Config
require('dotenv').config();

// Environment Variables
let node_env = process.env.NODE_ENV;
let port = process.env.PORT || 3000;
let logger_format = node_env === 'dev' ? 'dev' : 'common';

// Application Config
let app = express();
app.set('port', port);
app.set('env', node_env);

// Routes Imports

// Middleware Config
app.use(logger(logger_format));
app.use(helmet());
app.use(cors());
app.use(express.json());
app.use(express.urlencoded({extended: false}));

// Routing Config

// Catch 404 and forward to error handler
app.use((_req, _res, next) => {
  next(new createError.NotFound());
});

// error handler
app.use(function(err, req, res, _next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'dev' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.json(err);
});

app.listen(port, () => {
  console.log(`===> Server is listening to port ${port} <===`);
});

module.exports = app;