This is a x86_64 bit operating system (underdev) which I am writing to understand computers at assembly level :D
Making Image:
docker build buildenv -t {tag for your image goes here...}
Spinning up container:
set your pwd to your cwd by export pwd=$PWD
docker run --rm -it -v "$pwd":/root/env {tag of your image...}
Inside Container:
make build-x86_64
you will see build and dist folder after running above commands. These folder contains the kernel. You can emulate this by using emulator like qemu as :
qemu-system-x86_64 -cdrom dist/x86_64/kernel.iso