add Zero GPU capabilities

gradio_ui.py

@@ -1,3 +1,4 @@
+import spaces
 import PIL
 import torch
 import subprocess
@@ -177,6 +178,7 @@ def blip_image_captioning(image: PIL.Image.Image,
 #     return caption
 
 # Define a function to process the image with the loaded model
+@spaces.GPU
 def process_image(image_path: str,
                   controlnet_model_name_or_path: str,
                   caption_model_name: str,