I'm sorry I'm not sure I understand the question, could you please rephrase the question and also add more details?

I have golang project rest api deploying in railway where I save image of product question is how can I add catalogue to save image? I added folder in github but I can not see project folder its content

I'm still not sure what you mean by catalogue, but if you are saving any files that you need persistence for you must be storing said files in a volume -

https://docs.railway.app/guides/volumes

i did not understand how to add volume please send me detailed instruction how to add volume with examples I attached screenshot to reply

I'm sorry but we can't offer coding help here.