app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cors = require('cors')
var logger = require('morgan');
var app = express();
var http = require('http');
var port = 4500 ;
var Router = require('./routes/index');

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.set('port', port);
app.use(logger('dev'));
app.use(express.json());
//app.use(express.urlencoded({ extended: false }));
app.use(express.static(path.join(__dirname, 'public')));
app.use(cors());
app.use(Router);
app.use(function(req, res, next) {
  next(createError(404));
});
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');
});

var server = http.createServer(app);
server.listen(port);