Merge branch 'master' into autocomplete_swisscows

Dockerfile

@@ -76,4 +76,11 @@ LABEL maintainer="searx <https://github.com/asciimoo/searx>" \
       org.label-schema.vcs-ref=${LABEL_VCS_REF} \
       org.label-schema.vcs-url=${LABEL_VCS_URL} \
       org.label-schema.build-date="${LABEL_DATE}" \
-      org.label-schema.usage="https://github.com/searx/searx-docker"
+      org.label-schema.usage="https://github.com/searx/searx-docker" \
+      org.opencontainers.image.title="searx" \
+      org.opencontainers.image.version="${SEARX_GIT_VERSION}" \
+      org.opencontainers.image.url="${LABEL_VCS_URL}" \
+      org.opencontainers.image.revision=${LABEL_VCS_REF} \
+      org.opencontainers.image.source=${LABEL_VCS_URL} \
+      org.opencontainers.image.created="${LABEL_DATE}" \
+      org.opencontainers.image.documentation="https://github.com/searx/searx-docker"