I built NoNodePay for this exact purpose a few years back, no lightning though. This is a simple shopping cart that creates keypool to give each buyer a unique address to pay to, as well as an admin dashboard to track orders, add new products etc. Lots of room for improvement but the basics are there.

https://github.com/coinables/NoNodePay

Here's a video demo and a walkthrough of how to set it up on just about any server, even free shared servers: https://www.youtube.com/watch?v=jBUnOFxe24s