feat: add .gitignore and apps/template for new apps

apps/template/manifests/app-service.yaml

@@ -0,0 +1,18 @@
+# Service 範本
+# 使用方式：將 {{APP_NAME}}、{{PORT}} 替換為實際值
+
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{APP_NAME}}-service
+  namespace: default
+  labels:
+    app: {{APP_NAME}}
+spec:
+  type: ClusterIP
+  selector:
+    app: {{APP_NAME}}
+  ports:
+    - name: http
+      port: 80
+      targetPort: {{PORT|8080}