added how to access metrics in readme file

Author: Ivetted

readme.md

@@ -1,2 +1,5 @@
 # Edge Service
-The edge service is one of the backing services that serves as the front door for the API. The services utilizes Zuul.
+The edge service is one of the backing services that serves as the front door for the API. The services utilizes Zuul.
+
+#Performance Metrics API
+Once edge service is UP, you can access the metrics at http://localhost:8080/actuator