Put docker-labels back in

Author: joschrew

Dockerfile

@@ -6,7 +6,15 @@ LABEL \
     maintainer="https://ocr-d.de/kontakt" \
     org.label-schema.vcs-ref=$VCS_REF \
     org.label-schema.vcs-url="https://github.com/OCR-D/ocrd_kraken" \
-    org.label-schema.build-date=$BUILD_DATE
+    org.label-schema.build-date=$BUILD_DATE \
+    org.opencontainers.image.vendor="DFG-Funded Initiative for Optical Character Recognition Development" \
+    org.opencontainers.image.title="ocrd_kraken" \
+    org.opencontainers.image.description="Kraken bindings" \
+    org.opencontainers.image.source="https://github.com/OCR-D/ocrd_kraken" \
+    org.opencontainers.image.documentation="https://github.com/OCR-D/ocrd_kraken/blob/${VCS_REF}/README.md" \
+    org.opencontainers.image.revision=$VCS_REF \
+    org.opencontainers.image.created=$BUILD_DATE \
+    org.opencontainers.image.base.name=ocrd/core-cuda
 
 ENV DEBIAN_FRONTEND noninteractive
 ENV PYTHONIOENCODING utf8