added required k8s and docker file

k8s/base/deployment.yaml

@@ -0,0 +1,87 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ecommerce-app
+  namespace: ecommerce
+  labels:
+    app: ecommerce-app
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: ecommerce-app
+  template:
+    metadata:
+      labels:
+        app: ecommerce-app
+    spec:
+      initContainers:
+        - name: wait-for-postgres
+          image: postgres:15-alpine
+          command:
+            - sh
+            - -c
+            - |
+              until pg_isready -h postgres -p 5432 -U vaishnavi; do
+                echo "Waiting for PostgreSQL..."; sleep 3
+              done
+        - name: wait-for-mongodb
+          image: mongo:7
+          command:
+            - sh
+            - -c
+            - |
+              until mongosh --host mongodb --port 27017 \
+                --eval "db.adminCommand('ping')" --quiet; do
+                echo "Waiting for MongoDB..."; sleep 3
+              done
+        - name: run-migrations
+          image: ecommerce-backend:latest
+          command:
+            - sh
+            - -c
+            - npx prisma migrate deploy
+          envFrom:
+            - secretRef:
+                name: app-secret
+          env:
+            - name: NODE_ENV
+              value: "production"
+      containers:
+        - name: ecommerce-app
+          image: ecommerce-backend:latest
+          ports:
+            - containerPort: 3000
+              name: http
+          envFrom:
+            - configMapRef:
+                name: app-config
+            - secretRef:
+                name: app-secret
+          volumeMounts:
+            - name: uploads-volume
+              mountPath: /app/uploads
+          resources:
+            requests:
+              cpu: "250m"
+              memory: "256Mi"
+            limits:
+              cpu: "500m"
+              memory: "512Mi"
+          readinessProbe:
+            httpGet:
+              path: /health
+              port: 3000
+            initialDelaySeconds: 15
+            periodSeconds: 10
+            failureThreshold: 3
+          livenessProbe:
+            httpGet:
+              path: /health
+              port: 3000
+            initialDelaySeconds: 30
+            periodSeconds: 20
+            failureThreshold: 3
+      volumes:
+        - name: uploads-volume
+          emptyDir: {}