[CORD-2940] Adding vrouter and fabric basic docs

Change-Id: If89f298fdb6c510eaa00bc327b1b1911bf2ae362
diff --git a/Makefile b/Makefile
index a8807f8..47166a3 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@
 build: setup
 	gitbook build
 
-setup: automation-tools cord-tester xos xos-gui xos-tosca swagger $(GENERATED_DOCS)
+setup: automation-tools cord-tester fabric vrouter xos xos-gui xos-tosca swagger $(GENERATED_DOCS)
 	gitbook init
 	gitbook install
 
@@ -44,6 +44,12 @@
 cord-tester:
 	ln -s ../test/cord-tester/docs cord-tester
 
+fabric:
+	ln -s ../orchestration/xos_services/fabric/docs fabric
+
+vrouter:
+	ln -s ../orchestration/xos_services/vrouter/docs vrouter
+
 xos:
 	ln -s ../orchestration/xos/docs xos
 
@@ -60,5 +66,5 @@
 	rm -rf $(GENERATED_DOCS)
 	rm -rf _book
 	rm -rf node_modules
-	rm -rf automation-tools cord-tester test xos xos-gui xos-tosca
+	rm -rf automation-tools cord-tester fabric vrouter test xos xos-gui xos-tosca
 
diff --git a/SUMMARY.md b/SUMMARY.md
index 3480db4..a9bd75d 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -33,6 +33,9 @@
             * [XOS Containers](xos/xos_internals.md)
             * [XOS Configuration](xos/modules/xosconfig.md)
     * [RCORD](profiles/rcord/configuration.md)
+    * [Services](operating_cord/services.md)
+        * [Fabric](fabric/README.md)
+        * [vRouter](vrouter/README.md)
 * [Defining Models in CORD](xos/README.md)
     * [XOS Support for Models](xos/dev/xproto.md)
     * [Core Models](xos/core_models.md)
diff --git a/operating_cord/services.md b/operating_cord/services.md
new file mode 100644
index 0000000..9bc789a
--- /dev/null
+++ b/operating_cord/services.md
@@ -0,0 +1,5 @@
+# Services
+
+This sections contains detailed instructions about how the single service works.
+It describe what the models and the dependencies of a service are,
+thus is particularly useful in case you want to create your own service chain.
\ No newline at end of file