Update app.py

app.py

@@ -51,7 +51,9 @@ def create_copy_button(text_to_copy):
             document.body.removeChild(el);
         }}
         </script>
-        <button onclick="copyToClipboard{button_id}()">Copy this Answer to clipboard</button>
+        <button onclick="copyToClipboard{button_id}()" class="btn" style="border: none; background: none;">
+            <img src="./copy.png;base64,{icon_base64}" style="width: 24px; height: 24px;"/>
+        </button>
     """
     return copy_js