I would licence it and pitch it to him as a SaaS. Bonus or a raise won't get you as much value for your product but this way you can get another stream of monthly income and maybe he knows other shipping companies that you can sell your product to. Good luck
This looks great thanks! I really appreciate the color blindness functionality. As a color blind web dev i really have issues with coming up with good color palettes and this looks like something i can use.
I really like Tim Ermilov's "Building products with Javascript" course. It goes on how to build a full product from backend to frontend and uses React for the frontend.