server.js

/* jshint esversion: 6 */
var express = require('express'),
    ejs = require('ejs'),
    app = express(),
    bodyParser = require('body-parser'),
    mongoose = require("mongoose");

//requiring routes
var indexRoutes = require("./routes/index");
var writerRoutes = require("./routes/writing");
var readerRoutes = require("./routes/reading");

var url = "mongodb://localhost:27017/int_blog";
mongoose.connect(url, {
    useNewUrlParser: true
}, function (err, db) {
    if (!err) {
        console.log("Connected to MongoDB");
    }
});

app.use(bodyParser.urlencoded({
    extended: true
}));
app.use(bodyParser.json());

app.set("view engine", "ejs");
app.use(express.static(__dirname + "/public"));

app.use("/", indexRoutes);
app.use("/reading", readerRoutes);
app.use("/writing", writerRoutes);

app.use(function (req, res, next) {
    res.status(404).render('404', {
        title: "sorry Page not found"
    });
});

let PORT = process.env.PORT || 3000;

app.listen(PORT, () => {
    console.log("Port up and running");
});