GitLab 9.3 release post

Review Apps link: https://release-9-3.about.gitlab.com/2017/06/22/gitlab-9-3-released/

Release Post 🎉

• Blog handbook: https://about.gitlab.com/handbook/marketing/blog/
• Release post handbook: https://about.gitlab.com/handbook/marketing/blog/release-posts/

General Contributions

General contributions from the team.

Due date: 06/14 (6th working day before the 22nd)

• Label MR: blog post release
• Add milestone
• Intro
• MVP
• Add cover image image_title (compressed)
• Upgrade barometer
• Top features
• Primary features
• Secondary features (improvements)
• Performance improvements
• Omnibus improvements
• Deprecations
• Documentation links
• Authorship (author's data)

Review

Content review (PMs)

Due date: 06/19 (2nd working day before the 22nd)

• Label MR: blog post release review-in-progress
• General review (PM)
  • Check Features' names
  • Check Features' availability (CE, EES, EEP)
  • Check Documentation links
  • Update data/promo.yml
  • Check all images' size - compress whenever > 300KB
  • Meaningful links (SEO)
  • Check links to product/feature webpages
• Copyedit (Sean P, Rebecca, or Marcia)
  • Title
  • Description
  • Grammar, spelling, clearness (body)
• Final review (Job)

Structural Check

Due date: 06/19 (2nd working day before the 22nd)

• Label MR: blog post release review-structure
• Check frontmatter (entries, syntax)
• Check image_title and twitter_image
• Check image shadow {:.shadow}
• Check images' ALT text
• Videos/iframes wrapped in <figure> tags (responsiveness)
• Add/check <!-- more --> separator
• Add/check cover img reference (at the end of the post)
• Columns (content balance between the columns)
• Badges consistency (applied to all headings)
• Remove any remaining instructions
• Remove HTML comments
• Run deadlink checker
• Update release template with any changes (if necessary)

data/release_posts/2017_06_22_gitlab_9_3_released.yml

@@ -417,6 +417,14 @@ features:
         [your own customizations](https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/doc/settings/nginx.md#inserting-custom-nginx-settings-into-the-gitlab-server-block)
         to the nginx configuration, please ensure they continue to work with version 1.12.
+    - name: Additional GitLab service metrics
+      available_in: [ce, ees, eep]
+      documentation_link: 'https://docs.gitlab.com/ee/administration/monitoring/prometheus/gitlab_metrics.html'
+      documentation_text: "Read through the documentation on the additional metrics"
+      image_url:
+      description: |
+        GitLab 9.0 [introduced Prometheus monitoring](https://about.gitlab.com/2017/03/22/gitlab-9-0-released/#monitoring-gitlab-with-prometheus) of the GitLab service providing insight into Redis, PostgreSQL, and system performance. As part of GitLab 9.3 we have added experimental monitoring of our ruby code base, starting with a handful of metrics like pipeline status and user sign ins. We will continue to instrument additional areas of GitLab in subsequent releases.
+
     - name: Omnibus Improvements
       available_in: [ce, ees, eep]
       image_url: