Treasure Map

After several long years, you finally found yourself on board the digital buccaneer. You know the treasure must be close, but searching the ship's navigation hasn't helped at all!

Can you steal the pirate's booty?

The description hints towards "navigation"

Checking out /robots.txt:

User-agent: *
Allow: /

# For those seeking treasure, check our sitemap!
Sitemap: http://localhost:5000/sitemap.xml 

/sitemap.xml:

<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
    <url>
        <loc>http://digitalbuccaneer.chals.mctf.io/</loc>
        <lastmod>2024-01-15</lastmod>
        <changefreq>daily</changefreq>
        <priority>1.0</priority>
    </url>
    <url>
        <loc>http://digitalbuccaneer.chals.mctf.io/crew</loc>
        <lastmod>2024-01-15</lastmod>
        <changefreq>weekly</changefreq>
        <priority>0.8</priority>
    </url>
    <url>
        <loc>http://digitalbuccaneer.chals.mctf.io/ship</loc>
        <lastmod>2024-01-15</lastmod>
        <changefreq>weekly</changefreq>
        <priority>0.8</priority>
    </url>
    <url>
        <loc>http://digitalbuccaneer.chals.mctf.io/history</loc>
        <lastmod>2024-01-15</lastmod>
        <changefreq>monthly</changefreq>
        <priority>0.6</priority>
    </url>
    <!--  SECRET TREASURE LOCATION - Do not tell the crew!  -->
    <url>
        <loc>http://digitalbuccaneer.chals.mctf.io/treasure-chamber</loc>
        <lastmod>2024-01-15</lastmod>
        <changefreq>never</changefreq>
        <priority>0.9</priority>
    </url>
</urlset>

/treasure-chamber contains the flag