Simple kubernetes deployment file.

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: demo-dp
  labels:
    app: demo
  namespace: demo-dev
spec:
  replicas: 2
  selector:
    matchLabels:
      app: demo
  template:
    metadata:
      labels:
        app: demo
    spec:
      containers:
      - image: my/app
        imagePullPolicy: Always
        name: demo-dev
        ports:
        - containerPort: 8080
          protocol: TCP