@mighty pagoda The Docker image or application that you are trying to use does not support your CPU architecture. Support for ARM64 is scarce, and most applications do not support it; thus, Docker images for those applications are built for AMD64(x86_64) only.
Multiarch Docker images have been built for applications that do run on ARM64, so make sure that your egg and docker image is up to date. SteamCMD eggs will not work at all.