I'm building a photobook website where users can upload photos and create their own photobooks from templates.

The problem is I don't have experience with building a photo editor or template system.

I'm trying to figure out:

• How do photobook websites usually create templates?
• Do they build their own editor (Konva/Fabric) or use existing tools?
• Are there ready-made SDKs or platforms for web-to-print or photobook editors?

My stack is likely React / Next.js.

If anyone has built something similar or knows good tools for this, I'd really appreciate the advice.