added reference to github on landing page

Author: Jobst Beckmann

docs/index.html

@@ -5,6 +5,9 @@
   <meta name="viewport" content="width=device-width, initial-scale=1" />
   <title>SUNRISE Ontology</title>
   <meta name="description" content="An ontology defining ODD and scenario-related concepts within the SUNRISE project, aligned with ISO 34503 and ISO 34504." />
+  <link rel="canonical" href="https://ika-rwth-aachen.github.io/sunrise_ontology/">
+  <link rel="repository" href="https://github.com/ika-rwth-aachen/sunrise_ontology">
+  <meta name="github-repo" content="ika-rwth-aachen/sunrise_ontology">
 
   <!-- Simple, clean styling -->
   <style>
@@ -182,8 +185,16 @@ <h2 id="acknowledgements">Acknowledgements</h2>
     </p>
 
     <footer>
-      Hosted on GitHub Pages • Last updated: 2025-11-07
-    </footer>
+	  <p>
+		Hosted on
+		<a href="https://pages.github.com/" target="_blank" rel="noopener">GitHub Pages</a> •
+		Source code available on
+		<a href="https://github.com/ika-rwth-aachen/sunrise_ontology" target="_blank" rel="noopener">
+		  <strong>ika-rwth-aachen/sunrise_ontology</strong>
+		</a>
+	  </p>
+	  <p class="muted">Last updated: 2025-11-07</p>
+	</footer>
   </main>
 </body>
 </html>