add docs

doc/examples/management/metrics.md

@@ -1,3 +1,5 @@
+### Requests
+
 Метрики приложения в формате prometheus:
 
 ```shell
@@ -16,3 +18,13 @@ curl --request GET \
 curl --request GET \
      --url 'http://localhost:8081/spring-metrics/<metric-name>' 
 ```
+
+### Prometheus scrape
+
+```yaml
+scrape_configs:
+  - job_name: spring-boot-demo
+    metrics_path: /metrics
+    static_configs:
+      - targets: [spring-boot-demo-demo-1:8081]
+```