feat: configure docker buildx for multi platform docker image

.github/workflows/docker-publish.yml

@@ -25,15 +25,10 @@ jobs:
       uses: sigstore/cosign-installer@main
       with:
         cosign-release: 'v1.7.1'
-
     - name: Set up QEMU
-      uses: docker/setup-qemu-action@v2
-      with:
-        platforms: linux/amd64,linux/arm64
-
+      uses: docker/setup-qemu-action@v3
     - name: Setup Docker buildx
-      uses: docker/setup-buildx-action@v2
-
+      uses: docker/setup-buildx-action@v3
     - name: Log into registry ${{ env.REGISTRY }}
       if: github.event_name != 'pull_request'
       uses: docker/login-action@v2
@@ -57,13 +52,13 @@ jobs:
     # https://github.com/docker/build-push-action
     - name: Build and push Docker image
       id: build-and-push
-      uses: docker/build-push-action@v3
+      uses: docker/build-push-action@v5
       with:
         file: Dockerfile
         context: .
         push: ${{ github.event_name != 'pull_request' }}
         tags: ${{ env.REGISTRY }}/${{ env.IMAGE_REPOSITORY }}:latest
         labels: ${{ steps.meta.outputs.labels }}
-        platforms: linux/amd64, linux/arm64
+        platforms: linux/amd64, linux/arm64, linux/arm64/v8, linux/arm/v7
         cache-from: type=gha
         cache-to: type=gha,mode=max

Dockerfile

@@ -1,4 +1,4 @@
-FROM busybox
+FROM --platform=$BUILDPLATFORM busybox
 
 RUN mkdir -p /app
 RUN chmod 777 /app