feat: Add official Helm Chart (#442)

Closes #192

charts/planka/Chart.yaml

@@ -0,0 +1,31 @@
+apiVersion: v2
+name: planka
+description: A Helm chart to deploy Planka and it's dependencies.
+
+# 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.
+# It is recommended to use it with quotes.
+appVersion: "1.11.0"
+
+dependencies:
+- alias: postgresql
+  condition: postgresql.enabled
+  name: postgresql
+  repository: &bitnami-repo https://charts.bitnami.com/bitnami
+  version: 12.5.1