Improve documentation

CONTRIBUTING.md

@@ -12,6 +12,7 @@ You can also run unit tests by running this command:
 docker-compose -f docker-compose-local.yml up --build --abort-on-container-exit imalive-tests 
 ```
 
-Then you can try jaegger UI here for the traces: http://localhost:16686
-
-And prometheus for the metrics: http://localhost:9090
+Then you can try:
+* jaegger UI here for the traces: http://localhost:16686
+* the opentelemetry metrics exporter endpoint: http://localhost:8889/metrics
+* prometheus: http://localhost:9090

README.md

@@ -16,8 +16,6 @@ Just a dummy healthcheck api for your nodes (support x86 and armhf for raspberry
 
 It provide a http/restful endpoint that you can use as a healthcheck rule to your loadbalancer and also publish a heartbit in stdout (usefull if you collect it in a log/alerting management system such as elasticstack).
 
-BTW we're also providing packages and images for elasticstack (Kibana, Elasticsearch, Filebeat) [here](https://gitlab.comwork.io/oss/elasticstack).
-
 ![kibana](./img/kibana.png)
 
 ## Table of content
@@ -166,6 +164,14 @@ You also can log only a json output by making the environment variable `LOG_FORM
 
 You can also configure an OTEL Grpc endpoint using the `OTEL_COLLECTOR_ENDPOINT` environment variable.
 
+Imalive is sending metrics and traces through GRPC OTLP, you'll be able to see your traces on Jaegger like this:
+
+![jaegger](./img/jaegger.png)
+
+And your metrics on Prometheus like this:
+
+![prometheus](./img/prometheus.png)
+
 ## Development / contributions
 
 Go see this [documentation](./CONTRIBUTING.md)