Merge branch 'dewet-geo-docs' into 'master'

Refactor instructions for Geo docs

When I followed these instructions, it was hard to keep my place, or get a feel for how close I am to the beginning or the end, so I am trying to create a numbered list for the **Secondary Node** instructions, but doing formatting while keeping it as a list is proving to be really hard.

/cc @axil

See merge request !864

doc/gitlab-geo/README.md

@@ -43,18 +43,14 @@ Keep in mind that:
 
 ## Setup instructions
 
-GitLab Geo requires some additional work installing and configuring your
-instance, than a normal setup.
-
-There are a couple of things you need to do in order to have one or more GitLab
-Geo instances. Follow the steps below in the **exact order** that they appear:
-
-1. Follow the instructions to [install GitLab Enterprise Edition][install-ee]
-   on the server that will serve as the secondary Geo node, but don't further
-   configure GitLab as authentication will be handled by the primary node (more
-   on this in the configuration step).
-1. [Setup a database replication](database.md) in `primary <-> secondary (read-only)` topology.
-1. [Configure GitLab](configuration.md) and set the primary and secondary nodes.
+In order to set up one or more GitLab Geo instances, follow the steps below in
+this **exact order**:
+
+1. Follow the first 3 steps to [install GitLab Enterprise Edition][install-ee]
+   on the server that will serve as the secondary Geo node. Do not login or
+   set up anything else in the secondary node for the moment.
+1. [Setup the database replication](database.md)  (`primary <-> secondary (read-only)` topology)
+1. [Configure GitLab](configuration.md) to set the primary and secondary nodes.
 
 ## After setup
 

doc/user/admin_area/geo_nodes.md

+# Geo nodes admin area
+
+For more information about setting up GitLab Geo, read the
+[Geo documentation](../../gitlab-geo/README.md).
+
+When you're done, you can navigate to **Admin area ➔ Geo nodes** (`/admin/geo_nodes`).
+
+In the following table you can see what all these settings mean:
+
+| Setting   | Description |
+| --------- | ----------- |
+| Primary   | This marks a Geo Node as primary. There can be only one primary, make sure that you first add the primary node and then all the others. |
+| URL       | Your instance's full URL, in the same way it is configured in  `/etc/gitlab/gitlab.rb` (Omnibus GitLab installations) or `gitlab.yml` (source based installations). |
+| Public Key | The SSH public key of the user that your GitLab instance runs on (unless changed, should be the user `git`). |
+
+A primary node will have a star right next to it to distinguish from the
+secondaries.