docs: add Kubernetes advanced deployment

docs/install/kubernetes.md

@@ -84,4 +84,3 @@ spec:
             name: goma-config
 ```
 
-## 4.  Kubernetes Advanced deployment using CRDs

docs/install/kuberntes-advanced.md

@@ -0,0 +1,141 @@
+---
+title: Kubernetes Advanced deployment
+layout: default
+parent: Installation
+nav_order: 5
+---
+
+# Kubernetes Advanced deployment using CRDs and an Operator
+
+**Install the CRDs and Operator into the cluster:**
+
+```sh
+kubectl apply -f https://raw.githubusercontent.com/jkaninda/goma-operator/main/dist/install.yaml
+```
+
+## Resources
+
+- Gateway
+- Route
+- Middleware
+
+## Gateway
+The **Gateway** serves as the entry point to the server, handling and routing incoming traffic.
+
+### Installation Details
+
+When a Gateway is installed, it automatically creates the following Kubernetes resources, all with the same name as the Gateway:
+
+- **Service**
+- **ConfigMap**
+- **Deployment**
+
+### Service Ports
+
+The service exposes the following ports:
+
+- **HTTP**: `8080`
+- **HTTPS**: `8443`
+
+### Exposing the Gateway Outside the Cluster
+
+To expose your Gateway outside the cluster, you have the following options:
+
+1. **Create an Ingress resource**:  
+   Configure an Ingress to route external traffic to your Gateway.
+
+2. **Change the Service Type**:  
+   Patch the Gateway's service to change its type (e.g., to `LoadBalancer` or `NodePort`) for external accessibility.
+
+
+```yaml
+apiVersion: gomaproj.github.io/v1beta1
+kind: Gateway
+metadata:
+  labels: {}
+  name: gateway-sample
+spec:
+  # The version of Goma Gateway
+  # See: https://github.com/jkaninda/goma-gateway/releases
+  gatewayVersion: 0.2.2 
+  ## Server config
+  server:
+    writeTimeout: 10
+    readTimeout: 15
+    idleTimeout: 30
+    logLevel: info
+    disableHealthCheckStatus: false
+    disableKeepAlive: false
+    enableMetrics: true
+  replicaCount: 1
+  resources:
+    limits:
+      cpu: 100m
+      memory: 128Mi
+    requests:
+      cpu: 100m
+      memory: 128Mi
+  # Enable auto scaling
+  autoScaling:
+    enabled: true
+    minReplicas: 2
+    maxReplicas: 5
+    targetCPUUtilizationPercentage: 80
+```
+
+## Middleware
+
+```yaml
+apiVersion: gomaproj.github.io/v1beta1
+kind: Middleware
+metadata:
+  name: basic-middleware-sample
+spec:
+    type: basic
+    paths:
+      - /admin/*
+    rule:
+        username: admin
+        password: admin
+```
+
+## Route
+
+```yaml
+apiVersion: gomaproj.github.io/v1beta1
+kind: Route
+metadata:
+  labels: {}
+  name: route-sample
+spec:
+  gateway: gateway-sample
+  routes:
+  - path: /
+    name: Example
+    hosts: []
+    rewrite: /
+    methods:
+      - GET
+      - POST
+      - PUT
+    destination: https://example.com
+    backends: []
+    insecureSkipVerify: false
+    healthCheck:
+      path: /
+      interval: 10s
+      timeout: 10s
+      healthyStatuses:
+        - 200
+        - 404
+    cors:
+      origins: []
+      headers: {}
+    rateLimit: 15
+    disableHostFording: true
+    interceptErrors: []
+    blockCommonExploits: false
+    ## Middleware names
+    middlewares:
+      - basic-middleware-sample
+```

docs/install/kuberntes-operator.md

@@ -1,12 +0,0 @@
----
-title: Kubernetes Operator
-layout: default
-parent: Installation
-nav_order: 5
----
-
-# Kubernetes Operator
-
-**Install the CRDs into the cluster:**
-
-