Merge pull request #1009 from fluxcd/container-sbom

build: Enable SBOM and SLSA Provenance

.github/workflows/release.yml

@@ -62,6 +62,8 @@ jobs:
       - name: Publish images
         uses: docker/build-push-action@v3
         with:
+          sbom: true
+          provenance: true
           push: true
           builder: ${{ steps.buildx.outputs.name }}
           context: .

Dockerfile

@@ -61,7 +61,7 @@ RUN export CGO_LDFLAGS="-static -fuse-ld=lld" && \
 # Ensure that the binary was cross-compiled correctly to the target platform.
 RUN xx-verify --static /source-controller
 
-FROM alpine:3.16
+FROM alpine:3.17
 
 ARG TARGETPLATFORM
 RUN apk --no-cache add ca-certificates \