• Have an account for a Docker registry images. You can use Docker or Quay.io

• Have a Kubernetes instances. You can run this using either Minikube, CodeReady Containers or Docker Desktop

• You can generate a Docker image with the following command:

  ./mvnw spring-boot:build-image -Dspring-boot.build-image.imageName=<your-id>/contacts-app-ui:v1

• Push you image

  docker push <your-id>/contacts-app-ui:v1

• You can generate the deployment with the following commands, make the necessary adjustments and deploy it to your Kubernetes instance.

  kubectl create deployment contacts-app-ui --image=<your-id>/contacts-app-ui:v1 --dry-run=client -o=yaml > k8s-deployment.yaml
  
  echo --- >> k8s-deployment.yaml
  
  kubectl create service loadbalancer contacts-app-ui --tcp=8080:8080 --dry-run=client -o=yaml >> k8s-deployment.yaml

This is the final deployment file: