Ask HN: What’s on your private home server?

It has been years (over a decade?) since I’ve had a server at dwelling however I am setting one up for media and I received to pondering: what else ought to I do with this field? So I used to be questioning what cool/nerdy/bizarre stuff you all are utilizing dwelling servers for. DNS and file sharing look like apparent purposes I may arrange. I already run e mail and net on a VPS in order that’s taken care of. What are you doing with your private home server?