Docusaurus-ify 1.20 (#26052)

See https://github.com/go-gitea/gitea/pull/26051

---------

Signed-off-by: jolheiser <john.olheiser@gmail.com>
Co-authored-by: JonRB <4564448+eeyrjmr@users.noreply.github.com>

docs/content/installation/on-kubernetes.en-us.md

@@ -0,0 +1,72 @@
+---
+date: "2020-03-19T19:27:00+02:00"
+title: "Install on Kubernetes"
+slug: "install-on-kubernetes"
+sidebar_position: 80
+toc: false
+draft: false
+aliases:
+  - /en-us/install-on-kubernetes
+menu:
+  sidebar:
+    parent: "installation"
+    name: "Kubernetes"
+    sidebar_position: 80
+    identifier: "install-on-kubernetes"
+---
+
+# Installation with Helm (on Kubernetes)
+
+Gitea provides a Helm Chart to allow for installation on kubernetes.
+
+A non-customized install can be done with:
+
+```
+helm repo add gitea-charts https://dl.gitea.com/charts/
+helm install gitea gitea-charts/gitea
+```
+
+If you would like to customize your install, which includes kubernetes ingress, please refer to the complete [Gitea helm chart configuration details](https://gitea.com/gitea/helm-chart/)
+
+## Health check endpoint
+
+Gitea comes with a health check endpoint `/api/healthz`, you can configure it in kubernetes like this:
+
+```yaml
+  livenessProbe:
+    httpGet:
+      path: /api/healthz
+      port: http
+    initialDelaySeconds: 200
+    timeoutSeconds: 5
+    periodSeconds: 10
+    successThreshold: 1
+    failureThreshold: 10
+```
+
+a successful health check response will respond with http code `200`, here's example:
+
+```
+HTTP/1.1 200 OK
+
+{
+  "status": "pass",
+  "description": "Gitea: Git with a cup of tea",
+  "checks": {
+    "cache:ping": [
+      {
+        "status": "pass",
+        "time": "2022-02-19T09:16:08Z"
+      }
+    ],
+    "database:ping": [
+      {
+        "status": "pass",
+        "time": "2022-02-19T09:16:08Z"
+      }
+    ]
+  }
+}
+```
+
+for more information, please reference to kubernetes documentation [Define a liveness HTTP request](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#define-a-liveness-http-request)