In order to run kubernetes part:

Build a project

gradle clean build

Build docker image

docker build . -t sample-app-backend:0.0.3

Create a config map

k create configmap sample-app-config --from-env-file kubernetes/app-sample.env

Create secret

k create secret generic app-secret --from-literal=DB_PASSWORD=qaz123

Run kubernets config

k apply -f kubernetes/sample-backend-deployment.yaml