Update README appropriately

README.md

@@ -30,6 +30,17 @@ This will delete existing images.
 ### To stop the application (all microservices)
     $ podman-compose down
 
+## Observations
+
+### Prometheus
+
+The prometheus collects the metrics from all 4 microservices. The UI runs at the http://localhost:9090.
+
+### Grafana
+
+Grafana runs at http://localhost:3000. To Log in, use the username `admin` and the password `admin`.
+There is already one minimalistic dashboard imported. However, feel free to experiment and visualize another attributes.
+
 ## Usage
 ### Used ports
 + Authorization - port 8083