chore: added more oci annotations

Signed-off-by: kvanzuijlen <[email protected]>

Dockerfile

@@ -36,4 +36,19 @@ COPY --from=build /go/bin/cp-plugin /bin/cp-plugin
 USER 65532:65532
 ENTRYPOINT ["cp-plugin", "/plugins/velero-plugin-for-gcp", "/target/velero-plugin-for-gcp"]
 
-LABEL org.opencontainers.image.source="https://github.com/vmware-tanzu/velero-plugin-for-gcp"
+ARG CREATED
+ARG VERSION
+ARG GIT_SHA
+
+LABEL \
+ org.opencontainers.image.created=${CREATED} \
+ org.opencontainers.image.url="https://hub.docker.com/r/velero/velero-plugin-for-gcp" \
+ org.opencontainers.image.documentation="https://velero.io" \
+ org.opencontainers.image.source="https://github.com/vmware-tanzu/velero-plugin-for-gcp" \
+ org.opencontainers.image.version=${VERSION} \
+ org.opencontainers.image.revision=${GIT_SHA} \
+ org.opencontainers.image.vendor="vmware-tanzu" \
+ org.opencontainers.image.licenses="Apache-2.0" \
+ org.opencontainers.image.title="velero-plugin-for-gcp" \
+ org.opencontainers.image.description="Plugins to support Velero on Google Cloud Platform (GCP)" \
+ org.opencontainers.image.base.name="scratch"

Makefile

@@ -103,14 +103,15 @@ container:
 ifneq ($(BUILDX_ENABLED), true)
  $(error $(BUILDX_ERROR))
 endif
- @docker buildx build --pull \
+ docker buildx build --pull \
  --output=type=$(BUILDX_OUTPUT_TYPE) \
  --platform $(BUILDX_PLATFORMS) \
  $(addprefix -t , $(IMAGE_TAGS)) \
  $(addprefix -t , $(GCR_IMAGE_TAGS)) \
  --build-arg=GOPROXY=$(GOPROXY) \
  --build-arg=PKG=$(PKG) \
  --build-arg=BIN=$(BIN) \
+ --build-arg=CREATED="$(shell date -u +'%Y-%m-%dT%H:%M:%SZ')" \
  --build-arg=VERSION=$(VERSION) \
  --build-arg=GIT_SHA=$(GIT_SHA) \
  --build-arg=GIT_TREE_STATE=$(GIT_TREE_STATE) \