Updating docs with ONLY_ONE option
diff --git a/README.md b/README.md
index e9103ba..e219b4c 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,8 @@
| `VOLTHA_ADAPTER_SIM_CHART` | onf/voltha-adapter-simulated | Helm chart to use to install simulated device adapter |
| `VOLTHA_ADAPTER_OPEN_OLT_CHART` | onf/voltha-adapter-openolt | Helm chart to use to install OpenOlt adapter |
| `VOLTHA_ADAPTER_OPEN_ONU_CHART` | onf/voltha-adapter-openonu | Helm chart to use to install OpenOnu adapter |
+| `ONLY_ONE` | no | Run a single `rw-core` and no `api-server` |
+
## Create Kubernetes Cluster
Kind provides a command line control tool to easily create Kubernetes clusters