Just be aware that cloud providers like to end-of-life their managed service versions pretty quickly, so you should plan on doing maintenance work on your deployment every year or so if you decide to go that route.

This hasn't been the case for the Docker-based services like GCP Cloud Run. As long as you have a container that has an HTTP server on 0.0.0.0:8080 you're good. You can run anything you want in the container.

https://docs.cloud.google.com/run/docs/container-contract