publish helm chart to GitLab package repo

.gitlab-ci.yml

 include:
   - remote: https://open.greenhost.net/stackspin/stackspin/raw/main/.gitlab/ci_templates/kaniko.yml
+  - remote: https://open.greenhost.net/stackspin/stackspin/-/raw/main/.gitlab/ci_templates/helm_package.yml
+  - template: 'Workflows/MergeRequest-Pipelines.gitlab-ci.yml'
 
 stages:
   - build
@@ -7,6 +9,13 @@ stages:
   # TODO: Re-enable after fixing #73
   # - application-test
   - integration-test
+  - lint-helm-chart
+  - package-helm-chart
+  - release-helm-chart
+
+variables:
+  CHART_NAME: single-sign-on
+  CHART_DIR: helmchart/single-sign-on/
 
 #login_test:
 #  image: python:3.8

helmchart/single-sign-on/CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this helm chart will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.1] - 2021-12-21
+
+- Host chart on Helm Repository
+
 ## [0.5.0] - 2021-12-10
 
 - Migrate ingress to networking.k8s.io/v1 API, needed for k8s >= 1.22

helmchart/single-sign-on/Chart.yaml

 apiVersion: v1
 description: A Helm chart for Stackspin's Single sign-on components
 name: single-sign-on
-version: 0.5.0
+version: 0.5.1