docs: Add getting started section to README.md

README.md

@@ -3,6 +3,49 @@
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+## Installation
+
+### Prerequisites
+
+- Your host Kubernetes cluster should meet [Virtink's requirements](https://github.com/smartxworks/virtink#requirements)
+- Your local environment should have [kubectl](https://kubernetes.io/docs/tasks/tools/#kubectl) and [clusterctl](https://cluster-api.sigs.k8s.io/user/quick-start.html#install-clusterctl) installed
+
+### Install knest
+
+Binaries for Linux, Windows and Mac are available in the [release](https://github.com/smartxworks/knest/releases) page.
+
+## Getting Started
+
+### Create a Nested Kubernetes Cluster
+
+You can create a nested Kubernetes cluster simply by typing:
+
+```bash
+knest create quick-start
+```
+
+knest would automatically install any missing components (Cluster API providers and Virtink) on the host cluster, create certain number of Virtink VMs, and form them into a new Kubernetes cluster. When the control plane of the new cluster is initialized, a corresponding kubeconfig file would be saved in the canonical kubeconfig directory (`$HOME/.kube/`) for you to further access and control the created cluster.
+
+### Scale the Nested Kubernetes Cluster
+
+You can scale your nested cluster easily as follows:
+
+```bash
+knest scale quick-start 3:3
+```
+
+The last argument is in the format of `CONTROL_PLANE_MACHINE_COUNT:WORKER_MACHINE_COUNT`. Leave `CONTROL_PLANE_MACHINE_COUNT` or `WORKER_MACHINE_COUNT` blank if you don't want to change it.
+
+### Delete the Nested Kubernetes Cluster
+
+You can delete your nested cluster as follows:
+
+```bash
+knest delete quick-start
+```
+
+Please be noted that this operation would delete all VMs and data of the nested cluster.
+
 ## License
 
 This project is distributed under the [Apache License, Version 2.0](LICENSE).