linux/arm64 Docker image contains the x86_64 EggContractor binary

[caraar12345]

Hey 👋 new Egg, Inc. fan and am amazed by the community/reverse engineering skills 🤩

I just went to run the EggContractor Docker image on a Pi 4 (arm64) and received the dreaded exec format error.

Looking at the image directly, the x86_64 binary has been included rather than the arm64 binary.

I wonder if buildkit is reusing the same builder image for all architectures?