text: const path = require('path');
  const express = require('express');
  const morgan = require('morgan');
  const app = express();
  module.exports = app;
  
  // logging middleware
  app.use(morgan('dev'));
  
  // body parsing middleware
  app.use(express.json());
  
  // auth and api routes
  // app.use('/auth', require('./auth'))
  app.use('/api', require('./api'));
  
  app.get('/', (req, res) =>
    res.sendFile(path.join(__dirname, '..', 'public/index.html'))
  );
  
  // static file-serving middleware
  app.use(express.static(path.join(__dirname, '..', 'public')));
  
  // any remaining requests with an extension (.js, .css, etc.) send 404
  app.use((req, res, next) => {
    if (path.extname(req.path).length) {
      const err = new Error('Not found');
      err.status = 404;
      next(err);
    } else {
      next();
    }
  });
  
  // sends index.html
  app.use('*', (req, res) => {
    res.sendFile(path.join(__dirname, '..', 'public/index.html'));
  });
  
  // error handling endware
  app.use((err, req, res, next) => {
    console.error(err);
    console.error(err.stack);
    res.status(err.status || 500).send(err.message || 'Internal server error.');
  });
  