Skunk cleaner shrimp tend to be pretty aggressive and eat just about anything so I don't think you need to do anything special.
Assuming you have fish that you're already feeding, the shrimp should just get whatever it wants/needs on its own.
If you want to supplement, anything meaty like pieces of clam/mussel works.
Before introduction, I would've suggested observational QT until after first molt but I'm guessing you're beyond that at this point.
Good luck...