Merge branch 'docs-geo-database-intro' into 'master'

Revise Geo database replication intro

See merge request gitlab-org/gitlab!72396

doc/administration/geo/setup/database.md

@@ -7,23 +7,21 @@ type: howto
 
 # Geo database replication **(PREMIUM SELF)**
 
-NOTE:
-If your GitLab installation uses external (not managed by Omnibus) PostgreSQL
-instances, the Omnibus roles are unable to perform all necessary
-configuration steps. In this case,
-[follow the Geo with external PostgreSQL instances document instead](external_database.md).
+This document describes the minimal required steps to replicate your primary
+GitLab database to a secondary node's database. You may have to change some
+values, based on attributes including your database's setup and size.
 
 NOTE:
-The stages of the setup process must be completed in the documented order.
-Before attempting the steps in this stage, [complete all prior stages](../setup/index.md#using-omnibus-gitlab).
+If your GitLab installation uses external (not managed by Omnibus GitLab)
+PostgreSQL instances, the Omnibus roles cannot perform all necessary
+configuration steps. In this case, use the [Geo with external PostgreSQL instances](external_database.md)
+process instead.
 
-This document describes the minimal steps you have to take to replicate your
-**primary** GitLab database to a **secondary** node's database. You may have to
-change some values, based on attributes including your database's setup and
-size.
+The stages of the setup process must be completed in the documented order.
+Before you attempt the steps in this stage, [complete all prior stages](../setup/index.md#using-omnibus-gitlab).
 
-You are encouraged to first read through all the steps before executing them
-in your testing/production environment.
+Be sure to read and review all of these steps before you execute them in your
+testing or production environments.
 
 ## Single instance database replication
 
@@ -214,7 +212,7 @@ There is an [issue where support is being discussed](https://gitlab.com/gitlab-o
    ## - Prevents automatic upgrade of Postgres since it requires downtime of
    ##   streaming replication to Geo secondary sites
    ## - Enables standard single-node GitLab services like NGINX, Puma, Redis,
-   ##   Sidekiq, etc. If you are segregating services, then you will need to
+   ##   or Sidekiq. If you are segregating services, then you will need to
    ##   explicitly disable unwanted services.
    ##
    roles(['geo_primary_role'])