Helm and Chart
Helm is a package manager for Kubernetes.
Helm Charts helps define, install and upgrade Kubernetes applications. That is to say, Helm is a took for managing Kubernetes charts, Charts are packages of pre-configured Kubernetes resources.
References
https://www.kubernetes.org.cn/3974.html
https://github.com/helm/helm/blob/master/docs/install.md
https://docs.helm.sh/using_helm/#quickstart-guide
https://github.com/helm/charts
https://github.com/helm/charts/tree/master/stable/concourse
https://docs.helm.sh/chart_template_guide/#the-chart-template-developer-s-guide
https://cloud.google.com/solutions/continuous-integration-helm-concourse#setting_up_your_environment