Create a Helm chart for the application with all services

[arun-gupta]

Create and publish a Helm chart that consists of greeting, name and webapp services.

[arun-gupta]

Creation is already done with #11. Need to publish to a repository.

[arun-gupta]

As listed at https://github.com/kubernetes/charts, https://kubernetes-charts.storage.googleapis.com/ is the default storage repository. We should include instructions on how to publish to a repository on AWS.