Update TOC

www/htdocs/index.html

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 - Our sample application
 - Running the application
 - Identifying bottlenecks
+- Introducing SwarmKit
 
 ---
 
-## Chapter 2: Scaling out
+## Chapter 2: scaling out our app on Swarm
 
-- SwarmKit
 - Creating our first Swarm
 - Running our first Swarm service
-
----
-
-## Chapter 3: our app on Swarm
-
 - Deploying a local registry
 - Overlay networks
 
 ---
 
-## Chapter 4: operating the Swarm
+## Chapter 3: operating the Swarm
 
 - Breaking into an overlay network
 - Rolling updates
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 ---
 
+## Chapter 4: deeper in Swarm
+
+- Dealing with stateful services
+- Scripting image building and pushing
+- Docker Application Bundles
+- Controlling Docker from a container
+- Node management
+
+---
+
 # Pre-requirements
 
 - Computer with network connection and SSH client