Fix: clipboard button not working

Resolved issue with non-functional clipboard button on homepage.

layouts/partials/footer.html

@@ -21,5 +21,18 @@
             </div>
         </div>
     </footer>
+
+   <!-- JavaScript code -->
+<script>
+    document.getElementById('copy-button').addEventListener('click', () => {
+      const curl = document.getElementById('curl');
+      const range = document.createRange();
+      range.selectNodeContents(curl);
+      window.getSelection().removeAllRanges();
+      window.getSelection().addRange(range);
+      document.execCommand('copy');
+    });
+</script>
+
 </body>
 </html>