fix: URL for presentations and 404

src/404.html

@@ -4,7 +4,7 @@
         <meta charset="UTF-8">
         <meta name="viewport" content="width=device-width, initial-scale=1.0">
         <title>404 - Page not found | janishutz.com</title>
-        <link rel="stylesheet" href="/css/style.css">
+        <link rel="stylesheet" href="https://janishutz.com/css/style.css">
         <style>
             .content h1 {
                 font-size: 8rem;

src/presentations/auth/index.html

@@ -49,7 +49,7 @@
                 <h3>PU</h3>
                 <p>This presentation is in German and was about my project that I did for school, StorageManager</p>
                 <a class="button" href="/auth/pu">View</a>
-                <a class="button" href="/storagemanager">StorageManager</a>
+                <a class="button" href="https://janishutz.com/storagemanager">StorageManager</a>
             </div>
         </div>
         <div class="side-by-side">