[FEAT] Add separate frontend/backend Ingress and runtime API_URL configuration

- Add two Ingress: peikarband.ir (frontend) and api.peikarband.ir (backend)
- Add runtime script to update .web/env.json from API_URL env var
- Remove --backend-only flag to enable both frontend and backend
- Configure API_URL from Helm values instead of build-time args
- Update .dockerignore to include update-env-json.sh script

helm/peikarband/values-production.yaml

@@ -27,7 +27,7 @@ appSecrets:
 
 # Reflex configuration for production
 reflex:
-  apiUrl: "https://peikarband.ir"  # Production API URL
+  apiUrl: "https://api.peikarband.ir"  # Production API URL (backend)
 
 podAnnotations:
   prometheus.io/scrape: "true"
@@ -72,6 +72,22 @@ ingress:
       hosts:
         - peikarband.ir
         - www.peikarband.ir
+  
+  # Backend API Ingress (api.peikarband.ir -> port 8000)
+  apiEnabled: true
+  apiAnnotations:
+    cert-manager.io/cluster-issuer: "letsencrypt-prod"
+    traefik.ingress.kubernetes.io/router.entrypoints: "websecure"
+    traefik.ingress.kubernetes.io/router.tls: "true"
+  apiHosts:
+    - host: api.peikarband.ir
+      paths:
+        - path: /
+          pathType: Prefix
+  apiTls:
+    - secretName: peikarband-api-tls
+      hosts:
+        - api.peikarband.ir
 
 postgresql:
   enabled: false  # Using SQLite for now