Init Helm chart (#255)

* Initial chart version

* Add CI/CD for chart

* Fix admin creds template

* Add command, args, env, envFrom

* Render volumes and volumeMounts with tpl

* Change persistance accessMode type

* Add update strategy config

* Use custom types in docs

* Add startup probe config

* Fix web.external_url config

ct.yaml

@@ -0,0 +1,5 @@
+# See https://github.com/helm/chart-testing#configuration
+remote: origin
+chart-dirs: deploy
+target-branch: master
+validate-maintainers: false