server.js

require('dotenv').config()
const express = require('express')
const app = express()
const ejs = require('ejs')
const path = require('path')
const expressLayout = require('express-ejs-layouts')
const PORT = process.env.PORT || 3001
const mongoose = require('mongoose')
const session = require('express-session')
const flash = require('express-flash')
const MongoDbStore = require('connect-mongo')(session)

//Database connection
mongoose.connect(process.env.MONGO_CONNECTION_URL, { useNewUrlParser: true, useCreateIndex:true, useUnifiedTopology: true, useFindAndModify : true });
const connection = mongoose.connection;
connection.once('open', () => {
    console.log('Database connected...');
}).catch(err => {
    console.log('Connection failed...')
});
//session store
let mongoStore = new MongoDbStore({
  mongooseConnection: connection,
  collection: 'sessions'
})
//session config
app.use(session({
  secret: process.env.COOKIE_SECRET,
  resave: false,
  store: mongoStore,
  saveUninitialized: false,
  cookie: { maxAge: 1000 * 60 * 60 * 24 } // 24 hour
}))

app.use(flash())

//Assets
app.use(express.static('public'))
app.use(express.json())

// Global middleware
app.use((req, res, next) => {
    res.locals.session = req.session
    next()
})

//set template engine
app.use(expressLayout)
app.set('views',path.join(__dirname,'/resources/views'))
app.set('view engine','ejs')


require('./routes/web')(app)

app.listen(PORT, ()=>{
  console.log(`Listening on port ${PORT}`)
})