Update JCON page

Author: cbos

content/talks/2025-JCON/demo_services.png

@@ -36,8 +36,54 @@ carousel:
 
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-![Announcement](speaker_banner.png)
+#### Slides
+
+{{< slideshare key="cSGMpae1hwkaJa" >}}
+
+#### Details about code examples
+
+An overview of the demo setup I used during the presentation:   
+![Demo setup](demo_services.png)   
+
+The `K6` scripts and the code of `Alpha` en `Beta` services can be found here:   
+🖵 [https://github.com/cbos/solving-problems-with-opentelemetry](https://goto.ceesbos.nl/solving-problems-with-otel)
+
+The `OpenTelemetry collector`, `Prometheus`, `Tempo`, `Loki` and `Grafana` are part of the Observability Toolkit:   
+🖵 [https://github.com/cbos/observability-toolkit](https://goto.ceesbos.nl/observability-toolkit)
+
+##### OpenTelemetry documentation
+
+As mentioned during the talk, OpenTelemetry has a lot of good documentation.   
+Here are some links:   
+- 🗎 [Java support introduction](https://opentelemetry.io/docs/languages/java/intro/)
+
+And some more links on zero code/auto-instrumentation:   
+- 🗎 [Java agent](https://opentelemetry.io/docs/zero-code/java/agent/)   
+- 🗎 [Annotations](https://opentelemetry.io/docs/zero-code/java/agent/annotations/) to create internal spans for example   
+- 🗎 [API](https://opentelemetry.io/docs/zero-code/java/agent/api/) to enrich your spans and create custom metrics    
 
+#### 📣 Application Observability Code Challenges
+
+With [Application Observability Code Challenges](/posts/application-observability-code-challenges) you can practice yourself.    
+The goals of the challenges:
+
+
+The goals of the challenges:
+- 🎉 - Have fun !
+- 🖵 - Learn to understand the behaviour of the code
+- 📈 - Learn how to use observability tools to understand code behaviour 📈
+- 🔍 - Spot the unexpected behaviour!
+- 🤗 - Practice and learn!
+- 🎁 - Share your findings and solution, either as a comment or as a pull request
+
+
+Here is a list of available code challenges:
+
+{{< challenges >}}
+
+#### JCON Talk announcement
+
+![Announcement](speaker_banner.png)