Recompile the AOSP source code of the emulator in budtmo/docker-android-x86-8.0 image

Docker Image:
_budtmo/docker-android-x86-8.0_

I'm doing research tasks and therefore I need to control different system properties. The best way of doing it seems to be by making changes to the source code and recompile it. After compiling the source, I could replace the _system.img_ file from the emulator in the docker image with the new generated image.

Where can I find the source of the AOSP that was used to compile the emulator in the image _budtmo/docker-android-x86-8.0_?

Thanks.