I'd expect react-router-serve ./build/server/index.js to work
due to vercel rewriting build paths, the ./build/server/index.js does not exist after running npm run build
instead it looks something like: ./build/server/nodejs-eyJtYXhEdXJhdGlvbiI6NjAsInJ1bnRpbWUiOiJub2RlanMifQ/index.js
I use the start command for tests because the dev server is extremely slow