Indeed you are right, I've just checked the submission rules <https://news.ycombinator.com/showhn.html> and they say confirm what you suggesting.

I'll change the title to remove the `Show HN`.

P.S.: I'm not the author, nor am I involved with Firecracker; however given they've just released v1.0.0, and no-one shared it, I thought it would be worth pointing at it.