Update 404.html

Author: Fernando-A-Rocha

web/resources/404.html

@@ -1,6 +1,7 @@
 <div id="not-found" style="display: none;">
     <h1>Page not found</h1>
-    <p>Error 404: The page you are looking for does not exist.</p>
+    <p><code id="pathname"></code></p>
+    <p><strong>The page you are looking for does not exist</strong> (Error 404)</p>
 </div>
 <script>
     // Get the current path
@@ -17,6 +18,7 @@ <h1>Page not found</h1>
         window.location.replace(newPath);
     } else {
         // Show the 'not-found' element if no redirect is needed
+        document.getElementById('pathname').textContent = path;
         document.getElementById('not-found').style.display = 'block';
     }
 </script>