doc: Move tools info to Getting Started chapter

The Getting Started chapter will hold information on
requirements and on performing initial set-up and build
activities.

Change-Id: Iacf14a049b20f59c84aeaefa1271255ed60a8a5b
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
Signed-off-by: Jimmy Brisson <jimmy.brisson@arm.com>
diff --git a/docs/getting_started/index.rst b/docs/getting_started/index.rst
new file mode 100644
index 0000000..5da6747
--- /dev/null
+++ b/docs/getting_started/index.rst
@@ -0,0 +1,15 @@
+Getting Started
+===============
+
+.. toctree::
+   :maxdepth: 1
+
+   requirements
+
+This document describes how to build the Trusted Firmware-A Tests (TF-A Tests)
+and run them on a set of platforms. It assumes that the reader has previous
+experience building and running the `Trusted Firmware-A (TF-A)`_.
+
+--------------
+
+*Copyright (c) 2019, Arm Limited. All rights reserved.*