It's funny because we've had a few devs in the Bitcoin community scoff at the term "serverless" :)

Serverless does not mean there are no servers! Mainly, it means that the developer doesn't have to think about the servers. The service provider handles it all for them, and typically they're also actively spinning up and down the functions a developer deploys on an on demand basis, which is very cheap for them.

Vercel and Netlify are the platforms we're thinking about when we're talking about serverless. They let you link your code via github and deploy for free very quickly, no setup or monthly fees. In the background they're spinning up and down your functions on demand.

With mdk, we've shoehorned LDK into a package that can deploy natively on these platforms. This means you get all the benefits of running a self-custodial lightning node without the cost / complexity of hosting one yourself. It's free to start and scales easily with your application.