add pre-requisites and caution message

site/content/en/docs/v0.1/quickstart.md

@@ -8,21 +8,25 @@ Follow these instructions to install, run, and test etcd with etcd-operator in a
 
 Pre-requisites:
 - [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/)
+- [kustomize](https://github.com/kubernetes-sigs/kustomize)
 - Kubernetes cluster and `kubectl` configured to use it
   - If you don't have a Kubernetes cluster, you can use [kind](https://kind.sigs.k8s.io/docs/user/quick-start/) to create a local one
+- cert-manager installed in the cluster
 
 1. Install etcd-operator:
     ```bash
-    kustomize build 'https://github.com/aenix-io/etcd-operator//config/default?ref=main' | kubectl apply -n etcd-operator -f -
+    kustomize build 'https://github.com/aenix-io/etcd-operator//config/default?ref=main' | kubectl apply -f -
     ```
 2. Check the operator is running:
     ```bash
-    kubectl get pods -n etcd-operator -l control-plane=controller-manager
+    kubectl get pods -n etcd-operator-system -l control-plane=controller-manager
     ```
 3. Create an etcd cluster:
     ```bash
-    kubectl apply -f https://raw.githubusercontent.com/aenix-io/etcd-operator/main/config/samples/etcd_v1alpha1_etcdcluster.yaml
+    kubectl apply -f https://raw.githubusercontent.com/aenix-io/etcd-operator/main/config/samples/etcd.aenix.io_v1alpha1_etcdcluster.yaml
     ```
+   **Caution**: by default emptyDir storage is used. It means such cluster configuration is not intended for long-term storage.
+
 4. Check the etcd cluster is running:
     ```bash
     kubectl get pods -l app.kubernetes.io/managed-by=etcd-operator

site/docker-compose.yaml

@@ -4,6 +4,7 @@ services:
 
   site:
     image: docsy/docsy-example
+    platform: linux/amd64
     build:
       context: .
     command: server