ci: try with all platforms

Author: willfarrell

.github/workflows/build.yml

@@ -21,6 +21,7 @@ jobs:
         uses: docker/setup-qemu-action@v1
       -
         name: Set up Docker Buildx
+        id: buildx
         uses: docker/setup-buildx-action@v1
       -
         name: Login to DockerHub
@@ -44,6 +45,7 @@ jobs:
           context: .
           file: ./Dockerfile
           push: true
-          #platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/ppc64le
+          platforms: ${{ steps.buildx.outputs.platforms }}
+          #platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           tags: |
             ${{ env.tag }}