RHIDP-4802 - Dynamic plugin: Document how users can add middleware functions to proxy backend

Author: Gerry-Forde

assemblies/dynamic-plugins/assembly-configuring-rhdh-plugins.adoc

@@ -23,4 +23,7 @@ include::../modules/dynamic-plugins/proc-topology-configure.adoc[leveloffset=+2]
 
 include::../assembly-bulk-importing-from-github.adoc[leveloffset=+1]
 
-include::../assembly-using-servicenow.adoc[leveloffset=+1]
+include::../assembly-using-servicenow.adoc[leveloffset=+1]
+
+// Overriding Core Backend Service Configuration
+include::../modules/dynamic-plugins/con-overriding-core-backend-services.adoc[leveloffset=+1]