Document changes to the initial admin password

[ci skip]

CHANGELOG

@@ -3,6 +3,9 @@ Please view this file on the master branch, on stable branches it's out of date.
 v 8.6.0 (unreleased)
   - Contributions to forked projects are included in calendar
   - Improve the formatting for the user page bio (Connor Shea)
+  - Removed the default password from the initial admin account created during
+    setup. A password can be provided during setup (see installation docs), or
+    GitLab will ask the user to create a new one upon first visit.
   - Fix issue when pushing to projects ending in .wiki
   - Fix avatar stretching by providing a cropping feature (Johann Pardanaud)
   - Don't load all of GitLab in mail_room

doc/install/installation.md

@@ -467,12 +467,15 @@ NOTE: Supply `SANITIZE=true` environment variable to `gitlab:check` to omit proj
 
 ### Initial Login
 
-Visit YOUR_SERVER in your web browser for your first GitLab login. The setup has created a default admin account for you. You can use it to log in:
+Visit YOUR_SERVER in your web browser for your first GitLab login.
 
-    root
-    5iveL!fe
+If you didn't [provide a root password during setup](#initialize-database-and-activate-advanced-features),
+you'll be redirected to a password reset screen to provide the password for the
+initial administrator account. Enter your desired password and you'll be
+redirected back to the login screen.
 
-**Important Note:** On login you'll be prompted to change the password.
+The default account's username is **root**. Provide the password you created
+earlier and login. After login you can change the username if you wish.
 
 **Enjoy!**