Web/node/sitemap.js

const express = require('express');
const {
    createSitemap
} = require('sitemap');
const fs = require("fs");

let app = express();
app.get('/sitemap.xml', function (_req, res) {
    let sitemap = createSitemap({
        hostname: 'https://ellpeck.de',
        urls: [{
                url: '/',
                priority: 0.8
            },
            {
                url: '/#projects',
                changefreq: 'monthly'
            },
            {
                url: '/#social',
                changefreq: 'yearly'
            },
            {
                url: '/#about',
                changefreq: 'monthly'
            },
            {
                url: '/#blog',
                changefreq: 'weekly',
                priority: 0.6
            }
        ]
    });

    fs.readFile(__dirname + "/../blog/posts.json", function (_, data) {
        var json = JSON.parse(data);
        for (var post of json) {
            sitemap.add({
                url: "/#blog-" + post["id"],
                priority: 0.4
            });
        }

        res.header('Content-Type', 'application/xml');
        res.send(sitemap.toXML());
    });
});
app.listen(3000);