ci: build Docker image for more plaforms

Author: buchdag

.github/workflows/build-publish.yml

@@ -80,7 +80,7 @@ jobs:
         with:
           context: .
           build-args: DOCKER_GEN_VERSION=${{ steps.docker-gen_version.outputs.VERSION }}
-          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/ppc64le,linux/s390x
           file: Dockerfile.${{ matrix.base }}
           push: true
           tags: ${{ steps.docker_meta.outputs.tags }}