$ mkdir myapp # create directory
$ cd myapp    # enter the directory
$ npm init -y # Initialize a configuration

$ npm install express

const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => {
  res. send('Hello World!')
})
app. listen(port, () => {
  console.log("Server is running")
})

router. use(function (req, res, next) {
  //.. some logic here .. like any other middleware
  next()
})

//depends on where the router "use()"
router. get('/events', (req, res, next) => {
  //..
})

app.delete('/', function (req, res) {
  res.send('DELETE request to homepage')
})

app.disable('trust proxy')
app.get('trust proxy')
// => false

var engines = require('consolidate')

app.engine('haml', engines.haml)
app.engine('html', engines.hogan)

var express = require('express')

var app = express()
app.listen(3000)

function logOriginalUrl (req, res, next) {
  console.log('ReqURL:', req.originalUrl)
  next()
}

function logMethod (req, res, next) {
  console.log('Request Type:', req.method)
  next()
}

const log = [logOriginalUrl, logMethod]

app.get('/user/:id', log,
  (req, res, next)=>{
    res.send('User Info')
  }
)

app.set('view engine', 'pug')
app.get('/', (req, res) => {
  res. render('index', {
    title: 'Hey', message: 'Hello there!'
  })
})