added small tutorial section at the end of exporter docs

content/en/docs/languages/erlang/exporters.md

@@ -176,11 +176,15 @@ config :opentelemetry,
 config :opentelemetry_exporter,
   otlp_protocol: :http_protobuf,
   otlp_endpoint: "http://localhost:4318"
-  # otlp_endpoint: "http://otel:4318" if using dockerfile
+  # otlp_endpoint: "http://otel:4318" if using docker compose file
 ```
 
 {{% /tab %}} {{< /tabpane >}}
 
+You can see your traces by running `docker compose up` in one terminal, then `mix phx.server` in another.
+After sending some requests through the app, go to `http://localhost:16686` and select `roll_dice_app` from the Service drop down,
+then click "Find Traces".
+
 ## Gotchas
 Some environments do not allow containers to execute as root users. If you
 work in an environment like this, you can add `user: "1001"` as a top-level key/value