How to get Kernel Headers into the image

[seidlplus]

Hello there,

for being able to build External Kernel Modules for installing a certain Driver (OFED for Mellanox), the Kernel Headers (linux-headers) are necessary.
/lib/modules/'uname -r'/build/ and /usr/src/linux-headers-'uname -r'/ are missing in the image built from the docker
Note: I found https://kernelnewbies.org/KernelHeaders and https://docs.kernel.org/kbuild/headers_install.html helpful for background knowledge

It would be great, if there would be a way to get the Kernel Headers installed during the image build.
Unfortunately i couldn't figure out how to edit runme.sh to get this done.
Could someone help me here or give me a hint?

As a Fallback, is there a way to correctly install (with Symlinks) the Kernel Headers after the image build, on the running Linux?
Note: After the build of the image via the Docker, the folder build/linux/ is provided, which seems to contain the Kernel Headers.
I tried several things with it, but ran into several problems.

Thank you for providing this build environment which provides good running images!
And thanks for your attention on my question.

[kotocom]

FYI: you can copycat the solution from line 570+
ef55ac6

Although, as reported, the system won't respect the headers due to version misalignment.