Adjust content relating to exposing HTTP endpoint

Resolves gh-72

README.adoc

@@ -213,8 +213,8 @@ You will see a new set of RESTful end points added to the application. These are
 
 They include: errors, http://localhost:8080/actuator/health[actuator/health], http://localhost:8080/actuator/info[actuator/info], http://localhost:8080/actuator[actuator].
 
-NOTE: There is also a `/actuator/shutdown` endpoint, but it's only visible by default via JMX. To https://docs.spring.io/spring-boot/docs/{spring_boot_version}/reference/htmlsingle/#production-ready-endpoints-enabling-endpoints[enable it as an HTTP endpoint], add
-`management.endpoints.shutdown.enabled=true` to your `application.properties` file.
+NOTE: There is also a `/actuator/shutdown` endpoint, but it's not visible by default. To http://docs.spring.io/spring-boot/docs/{spring_boot_version}/reference/htmlsingle/#production-ready-endpoints-enabling-endpoints[enable it as an HTTP endpoint], add
+`management.endpoints.web.exposure.include=health,info,shutdown` to your `application.properties` file.
 
 It's easy to check the health of the app.