Specification for a Kubernetes Deployment and Service

k8s_deployment_with_service.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers: 
      - name: my-container
        image: gcr.io/hello-minikube-zero-install/hello-node 
---
apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  selector:
    app: my-app
  ports:
  - port: 8080
  type: LoadBalancer

To see a line-by-line explanation, see this Gist.
This Gist is used in a Medium article on getting started with K8s.