Update app.py

app.py

@@ -31,6 +31,7 @@ def generate_and_show_surfer_image(next_tide: str) -> str:
     prompt = f"Generate a surfer {action}"
     try:
         image_result = image_generation_tool(prompt) 
+        image_byte_arr = io.BytesIO()
         image_result.save(image_byte_arr, format='JPEG')
         image_byte_arr = image_byte_arr.getvalue()
         base64_image = base64.b64encode(image_byte_arr).decode('utf-8')