Merge branch 'new-docs-linting-image' into 'master'

Change image for docs link checking

See merge request gitlab-org/gitlab-runner!1043

.gitlab-ci.yml

@@ -213,15 +213,15 @@ unit tests with race 3 5: *unit_tests_with_race
 unit tests with race 4 5: *unit_tests_with_race
 
 docs check links:
-  image: "registry.gitlab.com/gitlab-org/gitlab-build-images:nanoc-bootstrap-ruby-2.4-alpine"
+  image: "registry.gitlab.com/gitlab-org/gitlab-build-images:gitlab-docs-lint"
   stage: test
   cache: {}
   dependencies: []
   before_script:
     - unset GPG_KEY
   script:
-    - mv docs/ /nanoc/content/
-    - cd /nanoc
+    - mv docs/ /tmp/gitlab-docs/content/
+    - cd /tmp/gitlab-docs
     # Build HTML from Markdown
     - bundle exec nanoc
     # Check the internal links