🐛 add missing js file

static/js/copy-code-button.js

@@ -0,0 +1,26 @@
+// This script adds copy buttons to all pre > code elements
+document.addEventListener('DOMContentLoaded', (event) => {
+    document.querySelectorAll('pre > code').forEach((codeBlock) => {
+        const container = codeBlock.parentNode;
+        const copyButton = document.createElement('button');
+        copyButton.className = 'copy-code-button';
+        copyButton.type = 'button';
+        copyButton.innerText = 'Copy';
+
+        copyButton.addEventListener('click', () => {
+            navigator.clipboard.writeText(codeBlock.innerText).then(
+                () => {
+                    copyButton.innerText = 'Copied!';
+                    setTimeout(() => {
+                        copyButton.innerText = 'Copy';
+                    }, 2000);
+                },
+                (error) => {
+                    console.error('Failed to copy code: ', error);
+                }
+            );
+        });
+
+        container.appendChild(copyButton);
+    });
+});