Indicate on signin page instance is self-managed

app/views/layouts/devise.html.haml

@@ -14,7 +14,7 @@
           .row.mt-3
             .col-sm-12
               %h1.mb-3.font-weight-normal
-                = brand_title
+                = current_appearance&.title.presence || "GitLab"
           .row.mb-3
             .col-sm-7.order-12.order-sm-1.brand-holder
               = brand_image
@@ -27,6 +27,9 @@
                 %p
                   = _('GitLab is a single application for the entire software development lifecycle. From project planning and source code management to CI/CD, monitoring, and security.')
 
+                %p
+                  = _('This is a self-managed instance of GitLab.')
+
               - if Gitlab::CurrentSettings.sign_in_text.present?
                 = markdown_field(Gitlab::CurrentSettings.current_application_settings, :sign_in_text)
 

changelogs/unreleased/jl-update-signin-page.yml

+---
+title: Indicate on signin page instance is self-managed
+merge_request: 44681
+author:
+type: changed

locale/gitlab.pot

@@ -26433,6 +26433,9 @@ msgstr ""
 msgid "This is a security log of important events involving your account."
 msgstr ""
 
+msgid "This is a self-managed instance of GitLab."
+msgstr ""
+
 msgid "This is the highest peak of users on your installation since the license started."
 msgstr ""