doc: reducing configuratino prefixes (#2033)

Author: sdelamo

src/main/docs/guide/distributedconfiguration/distributedconfigurationsecretsmanagersearch.adoc

@@ -0,0 +1,58 @@
+If your application name is `micronautguide` and it has the following https://micronaut-projects.github.io/micronaut-core/latest/guide/#environments[active environments] `ec2`, `cloud`, and `lambda`. The following configuration prefixes are searched:
+
+* `/config/micronautguide_ec2/`
+* `/config/micronautguide_cloud/`
+* `/config/micronautguide_lambda/`
+* `/config/micronautguide/`
+* `/config/application_ec2/`
+* `/config/application_cloud/`
+* `/config/application_lambda/`
+* `/config/application/`
+
+If you set:
+
+[configuration]
+----
+aws:
+    distributed-configuration:
+        search-active-environments:false
+----
+
+The following prefixes are searched:
+
+* `/config/micronautguide/`
+* `/config/application/`
+
+If you set:
+
+[configuration]
+----
+aws:
+    distributed-configuration:
+        search-common-application:false
+----
+
+The following prefixes are searched:
+
+* `/config/micronautguide_ec2/`
+* `/config/micronautguide_cloud/`
+* `/config/micronautguide_lambda/`
+* `/config/micronautguide/`
+
+By setting both:
+
+If you set:
+
+[configuration]
+----
+aws:
+    distributed-configuration:
+        search-active-environments:false
+        search-common-application:false
+----
+
+Only the following prefix is searched:
+
+* `/config/micronautguide/`
+
+IMPORTANT: Reducing the number of prefixes reduces the application's startup.

src/main/docs/guide/toc.yml

@@ -77,6 +77,7 @@ alexa:
 distributedconfiguration:
   title: Distributed Configuration
   distributedconfigurationsecretsmanager: AWS Secrets Manager
+  distributedconfigurationsecretsmanagersearch: Prefixes used for searching secrets
   parametersStore: AWS System Manager Parameter Store
 repository: Repository
 thirdPartyLibraries: Third-party libraries