Use Helm deployment.env[] values (#471)

helm/opengist/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: opengist
 description: Opengist Helm chart for Kubernetes
 type: application
-version: 0.1.0
+version: 0.2.0
 appVersion: 1.10.0
 home: https://opengist.io
 icon: https://raw.githubusercontent.com/thomiceli/opengist/master/public/opengist.svg