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/prod/kustomization.yaml

@@ -6,6 +6,7 @@ namespace: portfolio
 resources:
   - ../../base
   - resourcequota.yaml
+  - ingress.yaml
 
 commonLabels:
   environment: production
@@ -13,7 +14,7 @@ commonLabels:
 # 이미지 태그 설정
 images:
   - name: ghcr.io/mayne0213/portfolio
-    newTag: main-sha-e99afbace689963cdc552732f453adedfe1a751c
+    newTag: main-sha-56e4096a7ad4a4bef8a2a48fc005bd1991859793
 
 patchesStrategicMerge:
   - deployment-patch.yaml