Adding table of contents to docs longer than ~one page.

Change-Id: I3bb3afe88e5c54a3fdbed32a0a0dace1b65e85ee
diff --git a/docs/GettingStarted.md b/docs/GettingStarted.md
index de60e50..c7b7829 100644
--- a/docs/GettingStarted.md
+++ b/docs/GettingStarted.md
@@ -1,5 +1,7 @@
 # Getting started
 
+[TOC]
+
 ## Getting the source code
 
 ```shell