server.js

var express = require('express');
var serveIndex = require('serve-index');
var appRoot = require('app-root-path');
const fs = require('fs');

var app = express();
var images = appRoot.resolve('out/capturedData/');

app.use(express.static(appRoot.resolve('out')));
app.use('out/capturedData/', serveIndex(images, { 'icons': true }));

app.get('/list', function (req, res) {
    fs.readdir(images, (err, files) => {
        fs.readdir(images + 'good/', (goodErr, goodFiles) => {
            fs.readdir(images + 'bad/', (badErr, badFiles) => {
                if (err) {
                    res.status(500).send(err);
                }
                else {
                    res.send({
                        goodCount: goodErr ? 0 : goodFiles.filter(f => f.indexOf('.jpg') != -1).length,
                        badCount: badErr ? 0 : badFiles.filter(f => f.indexOf('.jpg') != -1).length,
                        images: files.filter(f => f.indexOf('.jpg') != -1)
                    });
                }
            });
        });
    });
});

app.post('/good/:name', function (req, res) {
    if (!fs.existsSync(images + 'good/')) {
        fs.mkdirSync(images + 'good/');
    }

    fs.rename(images + req.params.name, images + 'good/' + req.params.name, (err) => {
        if (err) res.status(500).send(err);
        else res.send('OK');
    });
});

app.post('/bad/:name', function (req, res) {
    if (!fs.existsSync(images + 'bad/')) {
        fs.mkdirSync(images + 'bad/');
    }

    fs.rename(images + req.params.name, images + 'bad/' + req.params.name, (err) => {
        if (err) res.status(500).send(err)
        else res.send('OK');
    });
});

var listener = app.listen(8888, () => {
    console.log('http://localhost:' + listener.address().port);
});