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

deploy/helm/README.md.gotmpl

@@ -0,0 +1,27 @@
+{{ template "chart.header" . }}
+{{ template "chart.deprecationWarning" . }}
+
+{{ template "chart.badgesSection" . }}
+
+{{ template "chart.description" . }}
+
+{{ template "chart.homepageLine" . }}
+
+{{ template "chart.maintainersSection" . }}
+
+{{ template "chart.sourcesSection" . }}
+
+{{ template "chart.requirementsSection" . }}
+
+## Installing the Chart
+
+To install the chart with the release name `wg-portal`:
+
+```console
+helm install wg-portal oci://ghcr.io/h44z/charts/wg-portal
+```
+
+This command deploy wg-portal on the Kubernetes cluster in the default configuration.
+The [Values](#values) section lists the parameters that can be configured during installation.
+
+{{ template "chart.valuesSection" . }}