website/docs/tasks/run-application/deployment-patch-demo.yaml

apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: patch-demo
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: patch-demo-ctr
        image: nginx