relocate runbooks folder under clusters

doc/topics/runbooks/index.md → doc/user/project/clusters/runbooks/index.md

@@ -15,22 +15,35 @@ code blocks or database queries against a given environment.
 
 ## Nurtch Executable Runbooks
 
-> [Introduced][ce-45912] in GitLab 11.4.
+> [Introduced](ce-45912) in GitLab 11.4.
 
 The JupyterHub app offered via GitLab’s Kubernetes integration now ships 
 with Nurtch’s Rubix library, providing a simple way to create DevOps 
 runbooks. A sample runbook is provided, showcasing common operations.
 
-The below video provides an overview of how this is acomplished in GitLab.
-
-<iframe width="560" height="315" src="https://www.youtube.com/embed/Q_OqHIIUPjE" 
-frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
+**<i class="fa fa-youtube-play youtube" aria-hidden="true"></i>
+Watch this [video](https://www.youtube.com/watch?v=Q_OqHIIUPjE)
+for an overview of how this is acomplished in GitLab!**
 
 ## Requirements
 
 To create an executable runbook, you will need:
 
-1. **Kubernetes Cluster** - 
-1. **Helm Tiller** - 
-1. **Ingress** -
-1. **JupyterHub** -
+1. **Kubernetes** - A Kubernetes cluster is required to deploy the rest of the applications. 
+    The simplest way to get started is to add a cluster using [GitLab's GKE integration](https://docs.gitlab.com/ee/user/project/clusters/#adding-and-creating-a-new-gke-cluster-via-gitlab).
+1. **Helm Tiller** - Helm is a package manager for Kubernetes and is required to install 
+    all the other applications. It is installed in its own pod inside the cluster which 
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+    can run the helm CLI in a safe environment.
+1. **Ingress** - Ingress can provide load balancing, SSL termination, and name-based 
+    virtual hosting. It acts as a web proxy for your applications.
+1. **JupyterHub** - JupyterHub is a multi-user service for managing notebooks across 
+    a team. Jupyter Notebooks provide a web-based interactive programming environment 
+    used for data analysis, visualization, and machine learning.
+
+## Nurtch
+
+Nurtch is the company behind the [Rubix library](https://github.com/Nurtch/rubix). Rubix is 
+an open-source python library that makes it easy to perform common DevOps tasks inside Jupyter Notebooks. 
+Tasks such as plotting Cloudwatch metrics and rolling your ECS/Kubernetes app are simplified 
+down to a couple of lines of code. Check the [Nurtch Documentation](http://docs.nurtch.com/en/latest) 
+for more information.
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