added labels

.gitlab-ci.yml

@@ -28,7 +28,7 @@ docker-build:
         tag=":$CI_COMMIT_REF_SLUG"
         echo "Running on branch '$CI_COMMIT_BRANCH': tag = $tag"
       fi
-    - docker build --pull -t "$CI_REGISTRY_IMAGE${tag}" .
+    - docker build --pull --label org.label-schema.build-date=$(date -u +'%FT%H:%M:%SZ') --label org.label-schema.name="${NAME}" --label org.label-schema.vcs-url="${CI_PROJECT_URL}" --label org.label-schema.vcs-ref="${CI_COMMIT_SHA:0:8}" -t "${CI_REGISTRY_IMAGE}/${CI_COMMIT_REF_NAME}:${CI_COMMIT_SHA:0:8}" -t "$CI_REGISTRY_IMAGE${tag}" .
     - docker push "$CI_REGISTRY_IMAGE${tag}"
   # Run this job in a branch where a Dockerfile exists
   rules:

Dockerfile

@@ -1,5 +1,7 @@
 FROM alpine
 
+LABEL org.label-schema.schema-version="1.0.0-rc1"
+
 RUN apk fix && \
     apk --no-cache --update add git git-lfs gpg less man-pages openssh patch git-annex && \
     git lfs install