The document for setup Istio with ICP (#2434)

* Add setup doc for ICP

* Modify the title "Upgrate and Rollback" to "Upgrate or Rollback"

* add diagrams to highlight action

* fix some spelling errors

* use consistent font for UI items and fix some grammatical mistake.

content/docs/setup/kubernetes/quick-start-icp/index.md

@@ -0,0 +1,91 @@
+---
+title: Quick Start with IBM Cloud Private
+description: How to quickly setup Istio using IBM Cloud Private.
+weight: 21
+keywords: [kubernetes,icp]
+---
+
+Follow these instructions to install and run Istio in the
+[IBM Cloud Private](https://www.ibm.com/cloud/private)
+using the `Catalog` module.
+
+This guide installs the current release version of Istio.
+
+## Prerequisites
+
+- You need to have an available IBM Cloud Private cluster. Otherwise, you can follow [Installing IBM Cloud Private-CE](https://www.ibm.com/support/knowledgecenter/SSBS6K_2.1.0.3/installing/install_containers_CE.html) to create an IBM Cloud Private cluster.
+
+## Deploy Istio via the Catalog module
+
+- Log in to the **IBM Cloud Private** console.
+- Click `Catalog` on the right side of the navigation bar.
+- Click `Filter` on the right side of the search box and select the `ibm-charts` checking box.
+- Click `Operations` in the left navigation pane.
+
+{{< image width="100%" ratio="50%"
+    link="./istio-catalog-1.png"
+    caption="IBM Cloud Private - Istio Catalog"
+    >}}
+
+- Click `ibm-istio` in the right panel.
+
+{{< image width="100%" ratio="50%"
+    link="./istio-catalog-2.png"
+    caption="IBM Cloud Private - Istio Catalog"
+    >}}
+
+- (Optional) Change the Istio version using `CHART VERSION` drop-down.
+- Click the `Configure` button.
+
+{{< image width="100%" ratio="50%"
+    link="./istio-installation-1.png"
+    caption="IBM Cloud Private - Istio Installation"
+    >}}
+
+- Input the Helm release name (e.g. istio-1.0.3) and select `istio-system` as the target namespace.
+- Agree to the license terms.
+- (Optional) Customize the installation parameters by clicking `All parameters`.
+- Click the `Install` button.
+
+{{< image width="100%" ratio="50%"
+    link="./istio-installation-2.png"
+    caption="IBM Cloud Private - Istio Installation"
+    >}}
+
+After it is installed, you can find it by searching for its release name on the **Helm Releases** page.
+
+{{< image width="100%" ratio="40%"
+    link="./istio-release.png"
+    caption="IBM Cloud Private - Istio Installation"
+    >}}
+
+## Upgrade or Rollback
+
+- Log in to the **IBM Cloud Private** console.
+- Click the menu button on the left side of the navigation bar.
+- Click `Workloads` and select `Helm Releases`.
+- Find the installed Istio using its release name.
+- Click `Action` link and select `upgrade` or `rollback`.
+
+{{< image width="100%" ratio="50%"
+    link="./istio-upgrade-1.png"
+    caption="IBM Cloud Private - Istio Upgrade or Rollback"
+    >}}
+
+{{< image width="100%" ratio="50%"
+    link="./istio-upgrade-2.png"
+    caption="IBM Cloud Private - Istio Upgrade or Rollback"
+    >}}
+
+## Uninstalling
+
+- Log in to the **IBM Cloud Private** console.
+- Click the menu button on the left side of the navigation bar.
+- Click `Workloads` and select `Helm Releases`.
+- Find the installed Istio using its release name.
+- Click `Action` link and select `delete`.
+
+{{< image width="100%" ratio="50%"
+    link="./istio-deletion.png"
+    caption="IBM Cloud Private - Istio Uninstalling"
+    >}}