Prebuild images for Ray serve

Documentation Serve Config Files (serve build) — Ray 2.5.1 covers how to build and deploy serve config files and documentation here Deploying on VMs — Ray 2.5.1 tells how to add a runtime environment. It gives an example on how to load actual code using HTTP, which is great, but what I am trying to do is to build a custom image, containing this code. Is there a way to point config file to the code, that is already in the image?