ci: Push README to dockerhub

.gitlab-ci.yml

@@ -85,6 +85,13 @@ push_dockerhub_registry:
     - docker tag $CI_REGISTRY_IMAGE:latest $DOCKERHUB_REGISTRY_IMAGE:latest
     - docker push $DOCKERHUB_REGISTRY_IMAGE:$CI_COMMIT_TAG
     - docker push $DOCKERHUB_REGISTRY_IMAGE:latest
+    # Push the readme to dockerhub
+    - docker run -v $PWD:/workspace \
+      -e DOCKERHUB_USERNAME='$DOCKERHUB_REGISTRY_USER' \
+      -e DOCKERHUB_PASSWORD='$DOCKERHUB_REGISTRY_PASSWORD' \
+      -e DOCKERHUB_REPOSITORY='$DOCKERHUB_REGISTRY_IMAGE' \
+      -e README_FILEPATH='/workspace/README.md' \
+      peterevans/dockerhub-description:2
   only:
     refs:
       # Make sure to protect these tags!