doc(howTo.pages.actuator): add notes

spring-boot-project/spring-boot-docs/src/docs/antora/modules/how-to/pages/actuator.adoc

@@ -1,25 +1,24 @@
 [[howto.actuator]]
 = Actuator
 
-Spring Boot includes the Spring Boot Actuator.
-This section answers questions that often arise from its use.
-
+Spring Boot Actuator
 
 
 [[howto.actuator.change-http-port-or-address]]
 == Change the HTTP Port or Address of the Actuator Endpoints
 
-In a standalone application, the Actuator HTTP port defaults to the same as the main HTTP port.
-To make the application listen on a different port, set the external property: configprop:management.server.port[].
-To listen on a completely different network address (such as when you have an internal network for management and an external one for user applications), you can also set `management.server.address` to a valid IP address to which the server is able to bind.
-
-For more detail, see the xref:api:java/org/springframework/boot/actuate/autoconfigure/web/server/ManagementServerProperties.html[`ManagementServerProperties`] source code and xref:reference:actuator/monitoring.adoc#actuator.monitoring.customizing-management-server-port[Customizing the Management Server Port] in the "`Production-Ready Features`" section.
-
+* if standalone application -> Actuator
+    ** HTTP port (defaults) == main HTTP port
+    ** if you want different HTTP port -> set `management.server.port`
+    ** if you want different network address -> set `management.server.address=validIPAddressToWhichServerCanBind`
+    ** Check
+        *** xref:api:java/org/springframework/boot/actuate/autoconfigure/web/server/ManagementServerProperties.html[`ManagementServerProperties`] source code
+        *** xref:reference:actuator/monitoring.adoc#actuator.monitoring.customizing-management-server-port[Customizing the Management Server Port] in the "`Production-Ready Features`" section
 
 
 [[howto.actuator.customize-whitelabel-error-page]]
 == Customize the '`whitelabel`' Error Page
-
+* TODO:
 Spring Boot installs a '`whitelabel`' error page that you see in a browser client if you encounter a server error (machine clients consuming JSON and other media types should see a sensible response with the right error code).
 
 NOTE: Set `server.error.whitelabel.enabled=false` to switch the default error page off.