Deploying using Helm to Kubernetes ( EKS )

I understand that lagom-recipes are deprecated. How does one use a real Cassandra server instead of reactive-lib sandbox ( https://github.com/lagom/lagom-recipes/blob/master/kubernetes-deployment/hello-kubernetes-java-mvn/pom.xml )

I will deploy Cassandra and my code is still the basic ‘Hello World’; ? How do I use Akka Http etc. easily ? Do I need it to deploy to EKS ?

Thanks,
Mohan