docker run -d \               
    --name some-postgres1 \
    -e POSTGRES_USER:postgres -e POSTGRES_PASSWORD=postgres -e POSTGRES_DB=postgres    -e PGDATA=/var/lib/postgresql/data/pgdata \
    -v "$(pwd)"/data:/var/lib/postgresql/data \
    -p 5432:5432 postgres

echo -n mongouser | base64  

1. ./mvnw clean package -DskipTests
2. mkdir docker
3. cp target/WAA_first_demo-0.0.1-SNAPSHOT.jar docker
4. docker tag 82950bb4816a 15719981948/waa_spring_postgres:first
5. docker push 15719981948/waa_spring_postgres:first

kubectl apply -f k8s/postgres-config.yml
kubectl apply -f k8s/postgres-secret.yml
kubectl apply -f k8s/postgres.yml
kubectl apply -f k8s/webapp.yml

Use :

kubectl --help
kubectl get all
kubectl get pod 
kubectl logs pod-id