doc: Add configuration index page

Change-Id: Ic318e04be73639de7d26e53e1f0b152d9803fd2f

doc/source/configuration/index.rst

@@ -0,0 +1,33 @@
+===================
+Configuration Guide
+===================
+
+The static configuration for nova lives in two main files: `nova.conf` and
+`policy.json`. These are described below. For a bigger picture view on
+configuring nova to solve specific problems, refer to the :doc:`Nova Admin
+Guide </admin/index>`.
+
+Configuration
+-------------
+
+* :doc:`Configuration Guide </admin/configuration/index>`: Detailed
+  configuration guides for various parts of you Nova system. Helpful reference
+  for setting up specific hypervisor backends.
+
+* :doc:`Config Reference </configuration/config>`: A complete reference of all
+  configuration options available in the `nova.conf` file.
+
+* :doc:`Sample Config File </configuration/sample-config>`: A sample config
+  file with inline documentation.
+
+Policy
+------
+
+Nova, like most OpenStack projects, uses a policy language to restrict
+permissions on REST API actions.
+
+* :doc:`Policy Reference </configuration/policy>`: A complete reference of all
+  policy points in nova and what they impact.
+
+* :doc:`Sample Policy File </configuration/sample-policy>`: A sample policy
+  file with inline documentation.

doc/source/index.rst

@@ -235,6 +235,7 @@ looking parts of our architecture. These are collected below.
    admin/index
    admin/configuration/index
    cli/index
+   configuration/index
    configuration/config
    configuration/sample-config
    configuration/policy