Make the Velero setup docs a separate installation step

ansible/group_vars/all/settings.yml.example

@@ -20,7 +20,7 @@ backup:
     # Disabled by default. To enable, change to `true` and configure the
     # settings below. You'll also need to provide access credentials as
     # secrets; see the documentation:
-    # http://docs.openappstack.net/en/latest/installation_instructions.html#backups
+    # https://docs.openappstack.net/en/latest/installation_instructions.html#step-2-optional-cluster-backups-using-velero
     enabled: false
     # URL of S3 service. Please use the principal domain name here, without the
     # bucket name.

docs/installation_instructions.rst

@@ -117,19 +117,24 @@ directory of the git repository. In this tutorial, we're using
 Install OpenAppStack
 --------------------
 
-Setting up OpenAppStack happens in three steps:
+Setting up OpenAppStack happens in four steps:
 
 1. **Set up cluster**
 
-   Create configuration files, and optionally create VPS
+   Create configuration files, and optionally create VPS.
 
-2. **Install OpenAppStack**
+2. **Optional: enable backups using Velero**
+
+   Optionally add settings and credentials to enable backups of your
+   cluster to external S3 storage.
+
+3. **Install OpenAppStack**
 
    Install Kubernetes and all the other software that comes with
    OpenAppStack. See `Usage <#usage>`__ for more information on which
    applications are installed.
 
-3. **Validate setup**
+4. **Validate setup**
 
    This runs a test in the browser to validate that the installation was
    successful.
@@ -293,27 +298,28 @@ the limitations of this:
    connecting to Nextcloud.
 -  You need to be able to resolve the domain names locally.
 
-Step 2: Installation
-~~~~~~~~~~~~~~~~~~~~
+Step 2: Optional: cluster backups using Velero
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-.. Tip::
+At this point you can enable `Velero <https://velero.io>`__, a program that
+runs on your cluster and uploads backups of your cluster and user data to an
+S3 storage service of your choice.
 
-   At this point you can enable `Velero <https://velero.io>`__, a program that
-   runs on your cluster and uploads backups of your cluster and user data to an
-   S3 storage service of your choice.
-   
-   To do so:
-   
-   - edit the file ``clusters/my-cluster/group_vars/all/settings.yml``,
-     reviewing all settings under the ``backup`` field and entering the data
-     specific to your backup storage location;
-   - create the directory ``clusters/my-cluster/secrets``;
-   - create the file ``clusters/my-cluster/secrets/s3_access_key``, with as
-     only contents your S3 access key;
-   - create the file ``clusters/my-cluster/secrets/s3_secret_key``, with as
-     only contents your S3 secret key.
-   
-   Then continue with the installation procedure as described below.
+To do so:
+
+- edit the file ``clusters/my-cluster/group_vars/all/settings.yml``,
+  reviewing all settings under the ``backup`` field and entering the data
+  specific to your backup storage location;
+- create the directory ``clusters/my-cluster/secrets``;
+- create the file ``clusters/my-cluster/secrets/s3_access_key``, with as
+  only contents your S3 access key;
+- create the file ``clusters/my-cluster/secrets/s3_secret_key``, with as
+  only contents your S3 secret key.
+
+Then continue with the installation procedure as described below.
+
+Step 3: Installation
+~~~~~~~~~~~~~~~~~~~~
 
 You're almost ready to start the OpenAppStack installation script.
 First, make sure your DNS configuration is propagated. To do so, make
@@ -355,7 +361,7 @@ to settle, and then continue to the Usage section.
    have the ``clusters/my-cluster`` directory and it contains the same
    ``secrets`` directory before you run the installation command.
 
-Step 3: Validate setup
+Step 4: Validate setup
 ~~~~~~~~~~~~~~~~~~~~~~
 
 Because OpenAppStack is still under development, we would like you to