CardsAgainstHumanity - Card Server

"use strict";

var fs = require('fs');
var http = require('http');

var container = {};

var server = http.createServer(handleRequest);

function handleRequest(request, response) {

    if (request.url === '/')
        serveCards(request, response);
}

function serveCards(request, response) {

    let deck = getDeck();
    var blackCard = getRandomCards(deck, 'black')[0];
    let whiteCards = getRandomCards(deck, 'white', blackCard['pick']);

    let html = getHtml();

    container.blackText = blackCard.text;
    container.whiteText = '';
    for (let i = 0; i < whiteCards.length; i++)
        container.whiteText += whiteCards[i] + '<br>';

    html = html.replace(/\$\{(\w*)}/g, (full, part) => container[part]);

    response.end(html);
}

function getHtml() {

    return fs.readFileSync('index.html', 'utf8');
}

function getDeck() {
    return JSON.parse(fs.readFileSync('cards.json', 'utf8'));
}

function getRandomCards(deck, color, amount) {

    let cards = [];

    for (let i = 0; i < (amount || 1); i++)
        cards.push(deck[color + 'Cards'][Math.floor(Math.random() * deck[color + 'Cards'].length)]);

    return cards;
}

server.listen(8080);