This project looks really neat!

Firecracker is very cool, I wish/hope tooling around it matures enough to be super easy. I'd love to see the technical details on how this is run. It looks like it's closed source?

The need for baremetal for Firecracker is a bit of a shame, but it's still wicked cool. (You can run it on a DO droplet but nested virtualization feels a bit icky?)

I run a CI app myself, and have looked at firecracker. Right now I'm working on moving some compute to Fly.io and it's Machines API, which is well suited for on-demand compute.