with kubernetes config files

backend/deployment.yaml

@@ -0,0 +1,77 @@
+# kubernetes/backend/backend.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: backend
+  namespace: todo-app
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: backend
+  template:
+    metadata:
+      labels:
+        app: backend
+        tier: api             # ← label for NetworkPolicy
+    spec:
+      containers:
+        - name: backend
+          image: silvarno/todo-backend:latest
+          ports:
+            - containerPort: 5000
+          env:
+            - name: PORT
+              value: "5000"
+            - name: NODE_ENV
+              value: "production"
+            - name: MONGO_URI
+              valueFrom:
+                secretKeyRef:
+                  name: todo-secrets
+                  key: MONGO_URI
+            - name: JWT_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: todo-secrets
+                  key: JWT_SECRET
+          # Security context
+          securityContext:
+            runAsNonRoot: true
+            runAsUser: 1000
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+          # Health checks
+          livenessProbe:
+            httpGet:
+              path: /health
+              port: 5000
+            initialDelaySeconds: 15
+            periodSeconds: 20
+          readinessProbe:
+            httpGet:
+              path: /health
+              port: 5000
+            initialDelaySeconds: 5
+            periodSeconds: 10
+          # Resource limits
+          resources:
+            requests:
+              memory: "128Mi"
+              cpu: "100m"
+            limits:
+              memory: "256Mi"
+              cpu: "500m"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: backend-service
+  namespace: todo-app
+spec:
+  selector:
+    app: backend
+  ports:
+    - port: 5000
+      targetPort: 5000
+  type: ClusterIP    # ← internal only