This just runs a request proxy that turns off after 10 seconds of no activity and starts it up (with a half second delay) when there is a new request. It runs SQLite with Prisma. Prisma is an API server that puts a GraphQL API in front of a DB.

It's a nice blog post about gluing technology and I can see how this could be a really nice way to run some lower-cost databases in a non-demanding development environment. However, it is not a reliable way of operating a database. For me it isn't really serverless since it only scales between 0 and 1 instance whereas a serverless DB ideally would scale-out but should at least have some ability to scale to greater load in response to demand, along with higher reliability and availability, and backing up data to object storage.