docs: documenting charmed operator (#572)

* docs: documenting charmed operator

README.md

@@ -5,6 +5,9 @@
   <a href="/~https://github.com/clastix/capsule/releases">
     <img src="https://img.shields.io/github/v/release/clastix/capsule"/>
   </a>
+  <a href="https://charmhub.io/capsule-k8s">
+    <img src="https://charmhub.io/capsule-k8s/badge.svg"/>
+  </a>
 </p>
 
 <p align="center">

docs/content/guides/charmed.md

@@ -0,0 +1,5 @@
+# Install Capsule on Charmed Kubernetes distribution
+
+[Canonical Charmed Kubernetes](/~https://github.com/charmed-kubernetes) is a Kubernetes distribution coming with out-of-the-box tools that support deployments and operational management and make microservice development easier. Combined with Capsule, Charmed Kubernetes allows users to further reduce the operational overhead of Kubernetes setup and management.
+
+The Charm package for Capsule is available to Charmed Kubernetes users via [Charmhub.io](https://charmhub.io/capsule-k8s).

docs/gridsome.server.js

@@ -70,6 +70,10 @@ module.exports = function (api) {
               label: 'Upgrading Tenant version',
               path: '/docs/guides/upgrading'
             },
+            {
+              label: 'Install on Charmed Kubernetes',
+              path: '/docs/guides/charmed'
+            },
             {
               title: 'Managed Kubernetes',
               subItems: [