H2O Wave is a cloud platform that allows you to easily deploy your waveups using Google CLI. Open source people can deploy it where they want, but if they don't want to manage the running and upgrading and backups and all that, they can buy that as a service for me. Is it hard to set up if I want to host it myself? Well, not really. Basically, the simplest thing that you need to do is just run a hit wave round.