Setup for CRUD project

server.js

// Import Libraries
var express = require('express');   
var session = require('express-session')                
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var passport = require('passport')
, LocalStrategy = require('passport-local').Strategy;
var cors = require('cors')

// ENV file with config
require('dotenv').config();

// - Mark: Models
var User = require('./models/user.model')

// - Mark: Routes for app
const apiRoutes = require('./routes/api');
const authRoutes = require('./routes/auth');

// This is an Express app
var app = express();

// - Mark: Mongoose configuration
mongoose.connect(process.env.MONGO_URI, {useNewUrlParser: true, useUnifiedTopology: true}); // connect to our database

// - Mark: API/json formatting config
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(cors())

// - Mark: AUTH - Session/Passport Configuration
app.use(session({
    secret: process.env.SESSION_SECRET || "development",
    maxAge: 24 * 60 * 60 * 1000, // 24 hours
    resave: true,
    saveUninitialized: true
    }));
app.use(passport.initialize());
app.use(passport.session());

// Passport Local Configuration uses User model to search for user email/password
passport.use(new LocalStrategy({
        usernameField: "email",
        passwordField: "password"
    },
    (username, password, done) => {
        User.findOne({ email: username }, function(err, user) {
            if (user) {
                done(null, user)
            } else {
                done(null, false, { message: 'Incorrect username or password'})
            }
      });
    }
));
passport.serializeUser((user, done) => {
    done(null, user.id)
})
passport.deserializeUser((id, done) => {
    User.findOne({_id: id}, (err, user) => {
        done(null, user)
    })
})

// Middleware to check if request is from logged user
const authMiddleware = (req, res, next) => {
    if (!req.isAuthenticated()) {
      res.status(401).send('You are not authenticated')
    } else {
      return next()
    }
}

// Routes
app.use('/api', apiRoutes);
app.use('/auth', authRoutes);

// Define port for the app
var port = process.env.PORT || 8080;

// Start the server
app.listen(port);
console.log('Magic happens on port ' + port);