Add endpoint example

#7068

modules/reference/pages/feature/mpOpenAPI-3.1/examples.adoc

@@ -35,3 +35,16 @@ mp.openapi.extensions.liberty.merged.info=
 * The `mp.openapi.extensions.liberty.merged.info` property sets the `info` section for the final OpenAPI document, which documents web modules 1, 2, and 4.
 
 For more information, see xref:ROOT:documentation-openapi.adoc#multi-module[Multiple application and multi-module application support with MicroProfile OpenAPI]
+
+=== Configure MicroProfile OpenAPI documentation endpoints
+
+MicroProfile OpenAPI generates and serves OpenAPI documentation for Jakarta RESTful Services (formerly JAX-RS) applications that are deployed to the Open Liberty runtime. The OpenAPI documentation is served from the `<host>:<port>/openapi` endpoint and a user interface for browsing this documentation is served from the `<host>:<port>/openapi/ui` endpoint.
+
+In MicroProfile OpenAPI 3.1 and later, you can configure the paths for these endpoints. Specify the `docPath` and `uiPath` attributes for the `mpOpenAPI` element in your `server.xml` file. For example, the following configuration sets the OpenAPI documentation for an `appA` application to `/appA/openapi`, while the UI to browse that documentation is available at `/appA/openapi/docUi`:
+
+[source:xml]
+----
+<mpOpenAPI docPath="/appA/openapi" uiPath="/appA/openapi/docUi" />
+----
+
+When the `uiPath` attribute is not set, it defaults to the value of the `docPath` attribute with `/ui` appended.