Added metrics to example

Author: Bruno Rodrigues

example/src/main/resources/application.yml

@@ -7,3 +7,13 @@ spring:
       location: /tmp
 server:
   port: 9000
+management:
+  endpoints:
+    web:
+      exposure:
+        include: health,info,metrics
+graphql:
+  servlet:
+    actuator-metrics: true
+graphiql:
+  enabled: true