NodeJS express - routing

Question

I´ve setup a little NodeJS API with 'expressjs'. In my code I have some similar code blocks looking like this:

app.get('/api/my/path', (req, res) => {
  doSomethingUseful();
});
All thoses requests do something different, so the function being called is always different too.

I´m asking myself if this is good practice for writing code in NodeJS or not. If there is a better / cleaner way of writing all those paths I would appreciate if you could tell me how or at least giving me a place to look for it.

EDIT 1: To be clear: I ask if it´s a good idea to write a lot of 'app.get(...)' into one source code file or if there is a better way?