How to use the ghost-ignition.server function in ghost-ignition

const express = require('express');
const debug = require('ghost-ignition').debug('app');
const hbs = require('express-hbs');
const multer = require('multer');
const server = require('ghost-ignition').server;
const errors = require('ghost-ignition').errors;
const gscan = require('../lib');
const fs = require('fs-extra');
const logRequest = require('./middlewares/log-request');
const uploadValidation = require('./middlewares/upload-validation');
const ghostVer = require('./ghost-version');
const pkgJson = require('../package.json');
const ghostVersions = require('../lib/utils').versions;
const upload = multer({dest: __dirname + '/uploads/'});
const app = express();
const scanHbs = hbs.create();

// Configure express
app.set('x-powered-by', false);
app.set('query parser', false);