Add created label

Dockerfile

@@ -7,13 +7,17 @@ RUN \
 
 FROM scratch
 
-ARG GIT_COMMIT=
+ARG \
+    GIT_COMMIT=\
+    BUILD_DATE=
 # Image annotations, see https://github.com/opencontainers/image-spec/blob/master/annotations.md
 LABEL \
     org.opencontainers.image.vendor=Zombi \
+    org.opencontainers.image.created=$BUILD_DATE \
     org.opencontainers.image.source=https://gitea.zom.bi/images/hello-world.git \
     org.opencontainers.image.revision=$GIT_COMMIT
 
+
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 
 ENV HELLO=world