Configure Ingress to route traffic through API7 Gateway

Modified Ingress configuration to route all traffic through the API7
Gateway (gateway-0-1759393614-gateway) instead of directly to application
services. This enables API7's advanced routing, rate limiting, CORS, and
other gateway features.

Changes:
- Updated ingress.yaml template to support gateway backend routing
- Modified values.yaml to route traffic to API7 Gateway service
- Disabled web and api services (now optional) as routing is handled by API7
- Removed nginx.ingress.kubernetes.io/rewrite-target annotation
- Maintained backward compatibility with legacy service-based routing

The Ingress now directs traffic to the API7 Gateway which handles all
routing logic defined in the ADC configuration.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

helm/api7ee-demo-k8s/values.yaml

@@ -10,7 +10,7 @@ global:
 
 # Configuration for the Web component
 web:
-  enabled: true
+  enabled: false # Disabled when using API7 Gateway routing
   replicaCount: 2
 
   image:
@@ -68,7 +68,7 @@ web:
 
 # Configuration for the API component
 api:
-  enabled: true
+  enabled: false # Disabled when using API7 Gateway routing
   replicaCount: 3
 
   image:
@@ -131,7 +131,6 @@ ingress:
   enabled: true
   className: "nginx"
   annotations:
-    nginx.ingress.kubernetes.io/rewrite-target: /
     cert-manager.io/cluster-issuer: "cloudflare-acme-prod"
 
   hosts:
@@ -139,10 +138,17 @@ ingress:
       paths:
         - path: /
           pathType: Prefix
-          service: web # Routes to web service
-        - path: /api
-          pathType: Prefix
-          service: api # Routes to API service
+          # Route to API7 Gateway instead of direct service
+          gateway:
+            serviceName: gateway-0-1759393614-gateway
+            port: 80
+        # Legacy configuration (commented out - use gateway instead)
+        # - path: /
+        #   pathType: Prefix
+        #   service: web # Routes to web service
+        # - path: /api
+        #   pathType: Prefix
+        #   service: api # Routes to API service
 
   tls:
     - secretName: api7ee-tls