Scale to zero

I have a serious side-project habit - I often have dozens of side projects on the go at once.

As such, I really appreciate scale-to-zero services like Google Cloud Run and Vercel, where if my project isn't getting any traffic at all it costs me nothing (or just a few cents a month in storage costs) - then it spins up a server when a request comes in, with a cold-start delay of a few seconds before it starts serving traffic.

I would love it if App Runner could do this! It looks like at the moment you have to pay for a minimum of one running instance.