Add GitLab-Pages version to Admin Dashboard

app/views/admin/dashboard/index.html.haml

@@ -111,6 +111,11 @@
               GitLab API
               %span.pull-right
                 = API::API::version
+            - if Gitlab.config.pages.enabled
+              %p
+                GitLab Pages
+                %span.pull-right
+                  = Gitlab::Pages::VERSION
             %p
               Git
               %span.pull-right

changelogs/unreleased/36953-add-gitLab-pages-version-to-admin-dashboard.yml

+---
+title: Add GitLab-Pages version to Admin Dashboard
+merge_request: 14040
+author: @travismiller
+type: added

lib/gitlab/pages.rb

+module Gitlab
+  module Pages
+    VERSION = File.read(Rails.root.join("GITLAB_PAGES_VERSION")).strip.freeze
+  end
+end