Add ARM support

Author: devantler

Diff for: .github/workflows/build.yaml

@@ -44,7 +44,7 @@ jobs:
         with:
           image: ${{ env.IMAGE_NAMESPACE }}
           tags: ${{ env.IMAGE_TAGS }} latest
-          platforms: linux/386, linux/amd64
+          platforms: linux/386, linux/amd64, linux/arm/v5, linux/arm/v7, linux/arm64/v8
           containerfiles: |
             ./Dockerfile.gh