index.js

const express = require('express')
const bodyParser = require('body-parser')
const app = express()
const morgan = require('morgan')
const moment = require('moment-timezone')
const config = require('./config/config')
const routes = require('./route/routes.js')
const cluster = require('cluster');

if (cluster.isMaster) {
    cluster.fork();
    cluster.on('exit', function(worker, code, signal) {
        console.log('restarting app..')
        cluster.fork();
    });
}
if (cluster.isWorker) {
    process.env.BASEDIR = __dirname
    app.use((req, res, next)=>{
        res.header('Access-Control-Allow-Origin', '*')
        res.header('Access-Control-Allow-Credentials', 'true')
        res.header('Access-Control-Allow-Methods', 'GET,HEAD,PUT,PATCH,POST,DEconstE')
        res.header('Access-Control-Expose-Headers', 'Content-Length')
        res.header('Access-Control-Allow-Headers', 'Accept, Authorization, Content-Type, X-Requested-With, Range')
        if (req.method === 'OPTIONS') {
            return res.send(200)
        } else {
            return next()
        }
    })

    morgan.token('date', (req, res, tz) => {
        return moment().tz(tz).format('DD MMMM YYYY hh:mm:ss');
    })
    morgan.format('myformat', ':remote-addr [:date[Asia/Jakarta]] ":method :url :http-version" :status :res[content-length] - :response-time ms ":user-agent"');

    app.use(bodyParser.json())
    app.use(morgan('myformat'))
    routes(app)
    app.listen(config.port, ()=>{
        console.log('app listening at port %s', config.port)
    })
}