Add instructions to use cluster template with load-balancer

Author: prankul88

docs/configuration.md

@@ -34,6 +34,18 @@ This command actually uses [the template file](../templates/cluster-template.yam
 
 Note: You can use [the template file](../templates/cluster-template.yaml) by manually replacing values.
 
+Note: If you wish to use cluster template without load-balancer, use command
+
+```bash
+clusterctl config cluster capi-quickstart \
+  --flavor without-lb
+  --kubernetes-version v1.18.2 \
+  --control-plane-machine-count=3 \
+  --worker-machine-count=3 \
+  > capi-quickstart.yaml
+
+```
+
 ## Operating system image
 
 We currently depend on an up-to-date version of cloud-init otherwise the operating system choice is yours. The kubeadm bootstrap provider we're using also depends on some pre-installed software like a container runtime, kubelet, kubeadm, etc.. . For an examples how to build such an image take a look at [image-builder (openstack)](https://image-builder.sigs.k8s.io/capi/providers/openstack.html).