A simple shell of an Express app

app.js

if(process.env.ENVIRONMENT != "PROD") {
    require('dotenv').config()
}

const express = require('express');
const app = express();
const bodyParser = require('body-parser');
const morgan = require('morgan')
const routes = require('./routes')

app.use(bodyParser.urlencoded({ extended: true }))
app.use(bodyParser.json())
app.use(morgan('tiny'))

app.use((req, res, next) => {
    res.header("Access-Control-Allow-Origin", "*")
    res.header("Access-Control-Allow-Methods", "GET, POST, PUT, OPTIONS, DELETE")
    res.header("Access-Control-Allow-Headers", "Content-Type, Authorization")

    // Approve response to pre-flight requests
    if('OPTIONS' == req.method) {
        res.send(200);
    } else {
        next()
    }
})

app.use('/', routes)

const port = 3000
app.listen(port)
console.log(`listening on http://localhost:${port}`)