Minor improvements to example doc (#6033)

examples/AspNetCore/README.md

@@ -1,6 +1,6 @@
-# OpenTelemetry ASP.NET Core 7 Web API Example
+# OpenTelemetry ASP.NET Core Web API Example
 
-This example uses the new WebApplication host that ships with .NET 7
+This example uses the new WebApplication host that ships with .NET
 and shows how to setup
 
 1. OpenTelemetry logging
@@ -13,7 +13,27 @@ service name, version and the machine on which this program is running.
 The sample rate is set to emit all the traces using `AlwaysOnSampler`.
 You can try out different samplers like `TraceIdRatioBasedSampler`.
 
+## Running Dependencies via Docker
+
+The example by default writes telemetry to stdout. To enable telemetry export
+via OTLP, update the `appsettings.json` file to replace `"console"` with
+`"otlp"`. Launching the application will then send telemetry data via OTLP.
+
+Use the provided "docker-compose.yaml" file to spin up the
+required dependencies, including:
+
+- **OTel Collector** Accept telemetry and forwards them to Tempo, Prometheus
+- **Prometheus** to store metrics
+- **Grafana (UI)** UI to view metrics, traces. (Exemplars can be used to jump
+  from metrics to traces)
+- **Tempo** to store traces // TODO: Add a logging store also.
+
+Once the Docker containers are running, you can access the **Grafana UI** at:
+[http://localhost:3000/](http://localhost:3000/)
+
 ## References
 
-* [ASP.NET Core 3.1 Example](https://github.com/open-telemetry/opentelemetry-dotnet/tree/98cb28974af43fc893ab80a8cead6e2d4163e144/examples/AspNetCore)
-* [OpenTelemetry Project](https://opentelemetry.io/)
+- [ASP.NET Core](https://learn.microsoft.com/aspnet/core/introduction-to-aspnet-core)
+- [Docker](http://docker.com)
+- [Prometheus](http://prometheus.io/docs)
+- [Tempo](https://github.com/grafana/tempo)