Add support for multiple platforms in image build

Author: mudler

.github/workflows/image.yml

@@ -59,7 +59,7 @@ jobs:
           builder: ${{ steps.buildx.outputs.name }}
           context: ./
           file: ./Dockerfile
-          platforms: linux/amd64
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
@@ -74,9 +74,9 @@ jobs:
           builder: ${{ steps.buildx.outputs.name }}
           context: ./
           file: ./Dockerfile
-          platforms: linux/amd64
+          platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           build-args: |
             PROJECT_NAME=${{ matrix.project }}
-          cache-from: type=gha,scope=${{ matrix.project }}-ci-image-main
+          cache-from: type=gha,scope=${{ matrix.project }}-ci-image-main