Transition from Label Schema to OCI labels

The Label Schema defined a common set for labels for docker images.
Now the Open Container Initiative has defined labels under the
org.opencontainers.image namespace, which are to replace the ones from
Label Schema.
https://github.com/opencontainers/image-spec/blob/main/annotations.md

So we transition to the new OCI labels, keeping the old ones around for
a period of time (like a year or so).

Author: flaix

generate/Dockerfile.template

@@ -261,7 +261,13 @@ LABEL maintainer="James Moger <james.moger@gitblit.com>, Florian Zschocke <f.zsc
       org.label-schema.name="gitblit" \
       org.label-schema.description="Gitblit is an open-source, pure Java stack for managing, viewing, and serving Git repositories." \
       org.label-schema.url="http://gitblit.com" \
-      org.label-schema.version="${GITBLIT_VERSION}"
+      org.label-schema.version="${GITBLIT_VERSION}" \
+      org.opencontainers.image.title="gitblit" \
+      org.opencontainers.image.description="Gitblit is an open-source, pure Java stack for managing, viewing, and serving Git repositories." \
+      org.opencontainers.image.url="http://gitblit.com" \
+      org.opencontainers.image.source="https://github.com/gitblit/gitblit-docker" \
+      org.opencontainers.image.documentation="https://github.com/gitblit/gitblit-docker/blob/master/hub-readme.md" \
+      org.opencontainers.image.version="${GITBLIT_VERSION}"
 
 
 ENV GITBLIT_VAR <% ${GITBLIT_VAR} %>

generate/generate_dockerfile.sh

@@ -253,7 +253,13 @@ printf "%s\n" LABEL\ maintainer=\"James\ Moger\ \<james.moger@gitblit.com\>\,\ F
       printf "%s\n" \ \ \ \ \ \ org.label-schema.name=\"gitblit\"\ \\
       printf "%s\n" \ \ \ \ \ \ org.label-schema.description=\"Gitblit\ is\ an\ open-source\,\ pure\ Java\ stack\ for\ managing\,\ viewing\,\ and\ serving\ Git\ repositories.\"\ \\
       printf "%s\n" \ \ \ \ \ \ org.label-schema.url=\"http://gitblit.com\"\ \\
-      printf "%s\n" \ \ \ \ \ \ org.label-schema.version=\"\$\{GITBLIT_VERSION\}\"
+      printf "%s\n" \ \ \ \ \ \ org.label-schema.version=\"\$\{GITBLIT_VERSION\}\"\ \\
+      printf "%s\n" \ \ \ \ \ \ org.opencontainers.image.title=\"gitblit\"\ \\
+      printf "%s\n" \ \ \ \ \ \ org.opencontainers.image.description=\"Gitblit\ is\ an\ open-source\,\ pure\ Java\ stack\ for\ managing\,\ viewing\,\ and\ serving\ Git\ repositories.\"\ \\
+      printf "%s\n" \ \ \ \ \ \ org.opencontainers.image.url=\"http://gitblit.com\"\ \\
+      printf "%s\n" \ \ \ \ \ \ org.opencontainers.image.source=\"https://github.com/gitblit/gitblit-docker\"\ \\
+      printf "%s\n" \ \ \ \ \ \ org.opencontainers.image.documentation=\"https://github.com/gitblit/gitblit-docker/blob/master/hub-readme.md\"\ \\
+      printf "%s\n" \ \ \ \ \ \ org.opencontainers.image.version=\"\$\{GITBLIT_VERSION\}\"
 printf "\n"
 printf "\n"
 printf "%s\n" ENV\ GITBLIT_VAR\ "${GITBLIT_VAR}"