Shields.io Docker for arm64 arch (64 bits raspberry)

:clipboard: **Description**
Hello !

I have a raspberry PI4 running on linux/arm64/v8 arch and i wanted to know if one day there will be a version of shield.io running on this plateform (it's also 64 bits)

Start by reviewing the repository's Docker image build process for linux/arm64/v8 support; the issue names no files or tests. Confirm whether a Raspberry Pi 4 image can be produced and define the build and runtime checks that would establish support.

Written by the indexing model from the issue text.