I have installed typescript in my project and it works fine on the frontend. on the backend I have a node express server. I've started implementing TS there. when I ran the server just now it failed with:

filename: (req: Request, file, cb) => {

SyntaxError: Invalid or unexpected token (pointing at the :)

How can I make TS work on the server?

I've installed esm which allows me to use imports, I've also included: "module": "commonjs" in the package.json

how do I fix this?