Vercel Daemons can now call services with bindings

Vercel Daemons can now call private services in their deployment through service bindings.

Declare the target service and an environment variable on the daemon, then make HTTP requests to the URL it receives. Vercel handles internal routing, authentication, and TLS.

Bindings work one way: services can't bind to daemons. Each daemon instance keeps calling its original deployment's services after a promotion or rollback, until that instance stops.

Daemons are in beta, run in production deployments with manually configured instance counts, and aren't currently run by vercel dev.