add OCI session in README.md

README.md

@@ -9,8 +9,20 @@ Please refer to Helm's [documentation](https://helm.sh/docs/) to get started.
 
 Once Helm is set up properly, add the repo as follows:
 
-```console
+```shell
 helm repo add undistro https://charts.undistro.io
 ```
 
 You can then run `helm search repo undistro` to see the charts.
+
+## OCI registry
+
+Alternatively, Undistro Helm charts are also available in an OCI registry 
+and can be referenced with the `oci://` prefix, as the following example:
+
+```shell
+helm upgrade --install myrelease oci://ghcr.io/undistro/helm-charts/mychart --version 0.1.0
+```
+
+Please refer to the [official Helm documentation](https://helm.sh/docs/topics/registries/) 
+for more information about OCI registries.