app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var hbs = require('hbs');

var indexRouter = require('./routes/index');
var apiRouter = require('./routes/api');

var app = express();

hbs.registerPartials(__dirname + '/views/partials');

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public'), { maxAge: 3600 }));

app.use(function (req, res, next) {
    res.removeHeader("x-powered-by");
    res.setHeader('X-Frame-Options' , 'deny' );
    res.setHeader('X-Content-Type-Options' , 'nosniff' );
    res.setHeader('X-Permitted-Cross-Domain-Policies' , 'none' );
    res.setHeader('X-XSS-Protection' , '1; mode=block' );
    res.setHeader('Cache-Control', 'public, max-age=' + 3600);
    next();
});

app.use('/', indexRouter);
app.use('/api', apiRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
    next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};

    // render the error page
    res.status(err.status || 500);
    res.render('error');
});

module.exports = app;