Publish a arm64 architecture container image

[hinricht]

Issue Report

Arm64 CPU architectures (i.e. new Macbooks with Apple M1) are not able to use the published container image.

Expected Behavior

There is a multi-arch image with at least arm64 and amd64 architectures.

Actual Behavior

Current image is is amd64 only.

Steps to Reproduce the Issue

• Given a arm64 device
• docker run ghcr.io/todogroup/repolinter will break with WARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested