fix: restore GatewayClass creation — Envoy Gateway chart does not create one

Envoy Gateway installs the GatewayClass CRD but no GatewayClass instance.
Added gateway.createClass (default true) so the first namespace install
creates it; subsequent installs set createClass=false to avoid conflicts.
helm.sh/resource-policy:keep prevents accidental deletion on uninstall.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: obezpalko

README.md

@@ -37,11 +37,12 @@ helm install envoy-router oci://ghcr.io/comet-ml/charts/envoy-router \
   --version 0.1.0 --namespace ns-1 --create-namespace
 ```
 
-For multiple namespaces, repeat:
+For multiple namespaces, the `GatewayClass` only needs to be created once (it is cluster-scoped). Set `gateway.createClass=false` for subsequent installs:
 
 ```bash
 helm install envoy-router oci://ghcr.io/comet-ml/charts/envoy-router \
-  --version 0.1.0 --namespace ns-2 --create-namespace
+  --version 0.1.0 --namespace ns-2 --create-namespace \
+  --set gateway.createClass=false
 ```
 
 ```
@@ -69,7 +70,8 @@ The pod will be reachable at `https://your-domain.com/<pod-name>/` within second
 |---|---|---|
 | `operator.podPort` | `8080` | Port the pods listen on |
 | `gateway.create` | `true` | Set `false` to skip Gateway creation |
-| `gateway.className` | `eg` | GatewayClass (Envoy Gateway installs `eg` by default) |
+| `gateway.createClass` | `true` | Create the GatewayClass (cluster-scoped — set `false` for 2nd+ namespace installs) |
+| `gateway.className` | `envoy-router` | GatewayClass name |
 | `gateway.port` | `80` | Listener port on the Gateway |
 
 ## Development

charts/envoy-router/templates/gatewayclass.yaml

@@ -0,0 +1,14 @@
+{{- if .Values.gateway.createClass -}}
+apiVersion: gateway.networking.k8s.io/v1
+kind: GatewayClass
+metadata:
+  name: {{ .Values.gateway.className }}
+  labels:
+    app.kubernetes.io/name: {{ include "envoy-router.name" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+  annotations:
+    # keep prevents deletion when this namespace's release is uninstalled
+    helm.sh/resource-policy: keep
+spec:
+  controllerName: gateway.envoyproxy.io/gatewayclass-controller
+{{- end }}

charts/envoy-router/values.yaml

@@ -12,8 +12,10 @@ serviceAccount:
 # Gateway resource created in the same namespace as the operator.
 # Uses the "eg" GatewayClass that Envoy Gateway installs automatically.
 gateway:
+  # createClass: create the GatewayClass (cluster-scoped, only needed once per cluster)
+  createClass: true
   create: true
-  className: eg
+  className: envoy-router
   name: envoy-router
   port: 80
   # Same: only HTTPRoutes from this namespace attach (per-namespace model)