Add helm chart publishing workflow (#18)

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

Signed-off-by: David Young <davidy@funkypenguin.co.nz>
Co-authored-by: Julien Duchesne <julien.duchesne@grafana.com>

.github/workflows/on-push-main-publish-chart.yml

@@ -0,0 +1,31 @@
+name: Publish helm chart
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'charts/**'
+      - '.github/workflows/on-push-main-publish-chart.yml'
+  workflow_dispatch:
+
+jobs:
+  publish-chart:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      - name: Run chart-releaser
+        uses: helm/chart-releaser-action@v1.1.0
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

charts/k6-loadtester/Chart.yaml

@@ -16,5 +16,5 @@ maintainers:
   - name: julienduchesne
 annotations:
   artifacthub.io/changes: |-
-    - kind: updated
-      description: Support initContainers and arbitrary volumes
+    - kind: added
+      description: Initial release