added K8s manifests (wip)

app/app-configmap.yaml

+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: app-config
+data:
+  PORT: 3000
+  # MONGODB_URL: mongo-service (from infra repo. Does this work? Or do I have to dynamically set it?)
+  MONGODB_URL: mongodb://<mongo-service>:27017/todo-app

app/app-deployment.yaml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: app-deployment
+  labels:
+    app: todo-app
+spec:
+  replicas: 3
+  strategy:
+    type: 'RollingUpdate'
+  selector:
+    matchLabels:
+      app: todo-app
+  template:
+    metadata:
+      labels:
+        app: todo-app
+    spec:
+      imagePullSecrets:
+      - name: 'gitlab-registry-credentials'
+      containers:
+      - image: devops-app
+        name: todo-app-container
+        ports:
+        - containerPort: 3000
+          # imagePullPolicy: IfNotPresent
+        envFrom:
+        - configMapRef:
+          name: app-config
+        - secretRef:
+          name: app-secrets

app/app-secrets.yaml

+apiVersion: v1
+kind: Secret
+metadata:
+  name: app-secrets
+type: Opaque
+data:
+  JWT_SECRET: <jwt-secret in base64>

app/app-service.yaml

+apiVersion: v1
+kind: Service
+metadata:
+  name: todo-app-service
+spec:
+  selector:
+      app: todo-app
+  ports:
+    - port: 80
+      targetPort: 3000
+      # port for external IP address (that you need to put in your browser)
+      # nodePort: 30000
+  type: LoadBalancer