Came across this very useful project. It provides Docker images with Android running directly in Docker, without qemu or an emulator. I've never seen this before, all other solutions that I'm aware of either run the Android emulator in Docker or use qemu directly (like Anbox).

Advantage of this is that it's very lightweight and does not require VT-X or AMD-V, ideal for running in cloud environments that typically do not expose this CPU capability.