Update app.py

Sending file type preference in http header

app.py

@@ -89,4 +89,7 @@ iface = gr.Interface(
 )
 
 if __name__ == "__main__":
+    # Set the Accept header to request images in a format-agnostic way, with other formats preferred over WebP
+    gr.config.INIT_HTTP_HEADERS["Accept"] = "image/*;q=0.9,image/webp;q=0.8"
+    
     iface.launch()