feat: update helm samples to use helm3 (#78)

* helm3 guestbook

* helm3 blue-green

* helm3 dependencies

* helm3 plugin

* helm3 plugin

* helm3 plugin

* helm3 apps

* helm3 dependency

* helm3 dependency

* helm3 dependency

* helm3 fix readme

apps/Chart.yaml

@@ -1,5 +1,23 @@
-apiVersion: v1
-appVersion: "1.0"
-description: Applications
+apiVersion: v2
 name: applications
+description: Applications
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
 version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+appVersion: "1.0"