FEAT(app): add per-application ingress management

- Added ingress.yaml for production and development environments
- Updated kustomization files to include ingress resources
- Migrated from centralized ingress management to per-app architecture

deploy/k8s/overlays/dev/ingress.yaml

@@ -0,0 +1,25 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: portfolio-dev-ingress
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+    cert-manager.io/cluster-issuer: "letsencrypt-prod"
+spec:
+  ingressClassName: haproxy
+  tls:
+  - hosts:
+    - dev.minjo0213.kro.kr
+    secretName: portfolio-dev-tls
+  rules:
+    - host: dev.minjo0213.kro.kr
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: portfolio-service
+                port:
+                  number: 80