Now that seccomp support is compiled into the kernel you can use the official docker builds located at https://download.docker.com/linux/static/stable/armhf/docker-19.03.8.tgz. I would recommend this particular build as docker-19.03.9 and above seem to have a dockerd binary that is not compatible with the EX4100 at least. Copy the extracted files from the tgz above into /mnt/HD/HD_a2/Nas_Prog/docker/docker if you are using the third party docker install for WD NAS that is floating around.
Cheers,
JediNite
