add file types

myapp/app.py

@@ -44,7 +44,9 @@ with gr.Blocks() as demo:
             prompt = gr.TextArea("A psychedelic vulture", label="Prompt")
             model = gr.Radio(MODELS, value=MODELS[0], label="Model")
             generate_button = gr.Button("Generate")
-            upload_button = gr.UploadButton("Upload")
+            upload_button = gr.UploadButton(
+                "Upload", file_types=["image"], type="filepath"
+            )
 
         with gr.Column():
             output = gr.Image()