added the kubernetes deployment

mongo-deployment.yml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: mongo
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: mongo
+  template:
+    metadata:
+      labels:
+        app: mongo
+    spec:
+      containers:
+        - name: mongo
+          image: mongo
+          ports:
+            - containerPort: 27017
+          volumeMounts:
+            - name: mongo-storage
+              mountPath: /data/db
+      volumes:
+        - name: mongo-storage
+          emptyDir: {}

mongo-service.yml

+apiVersion: v1
+kind: Service
+metadata:
+  name: mongo
+spec:
+  selector:
+    app: mongo
+  ports:
+    - port: 27017

todo-deployment.yml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: todo-app
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: todo
+  template:
+    metadata:
+      labels:
+        app: todo
+    spec:
+      containers:
+        - name: todo
+          image: todo-app-image
+          imagePullPolicy: Never
+          ports:
+            - containerPort: 5000
+          env:
+            - name: MONGO_URI
+              value: mongodb://mongo:27017/CloudComputing
\ No newline at end of file

todo-service.yml

+apiVersion: v1
+kind: Service
+metadata:
+  name: todo-service
+spec:
+  selector:
+    app: todo
+  ports:
+    - port: 80
+      targetPort: 5000
+  type: NodePort
\ No newline at end of file