# 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