Chapter11: Bulk Operations: api-server missing upload method ?

[smoothello]

Hi,
I've purchased the first edition and I've noticed that in the source-code of both editions at Chapter11 (bulk operations), the api server seems to be missing the "upload" post method corresponding to the UploadRecipesPreviewService->upload method.
Could you please clarify if I missed something obvious OR if that method is indeed missing from the api-server source-code ?
Thanks a lot in advance for your feedback.
Best Regards

[haihongyang]

I tried to follow the book. Start from Chapter 3. The page cannot be rendered. In the recipes-list model, there is a property called "category". But API data does not have that value. And also API need to install cors. Otherwise, frontend cannot get data.