Introduce rAPP Catalogue API

Change-Id: I0128c5b6405d2efd4de49d4ced200cd9fed6cf96
Issue-ID: NONRTRIC-287
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>
diff --git a/docs/api-docs.rst b/docs/api-docs.rst
index 12ff516..9b0608a 100644
--- a/docs/api-docs.rst
+++ b/docs/api-docs.rst
@@ -15,9 +15,10 @@
    :depth: 3
    :local:
 
-The Non-RT RIC consists of two parts, described in the sections below:
+The Non-RT RIC consists of three parts, described in the sections below:
  * The Policy Agent
  * The SDNC A1 Controller
+ * The rAPP Catalogue
 
 
 Policy Agent
@@ -44,6 +45,26 @@
 
 See the README.md file in the nonrtric/sdnc-a1-controller repo for info about how to use it.
 
+rAPP Catalogue
+==============
+
+The Non RT-RIC Service Catalogue provides a way for services to register themselves for other services to discover.
+
+See `RAC API <./rac-api.html>`_ for how to use the API.
+
+.. |swagger-icon| image:: ./images/swagger.png
+                  :width: 40px
+
+.. |yaml-icon| image:: ./images/yaml_logo.png
+                  :width: 40px
+
+
+.. csv-table::
+   :header: "API name", "|swagger-icon|", "|yaml-icon|"
+   :widths: 10,5, 5
+
+   "RAC API", ":download:`link <../r-app-catalogue/api/rac-api.json>`", ":download:`link <../r-app-catalogue/api/rac-api.yaml>`"
+
 Complementary tools
 ===================