Add Helm Chart Releaser workflow

Signed-off-by: Simon L <szaimen@e.mail.de>

.github/workflows/helm-release.yml

@@ -0,0 +1,48 @@
+
+name: Helm Chart Releaser
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'helm-chart/**'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Turnstyle
+        uses: softprops/turnstyle@v1
+        with:
+          continue-after-seconds: 180
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN  }}
+
+      - name: Fetch history
+        run: git fetch --prune --unshallow
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      # See https://github.com/helm/chart-releaser-action/issues/6
+      - name: Set up Helm
+        uses: azure/setup-helm@v3.1
+        with:
+          version: v3.6.3
+
+      - name: Run chart-releaser
+        uses: helm/chart-releaser-action@v1.4.1
+        with:
+          charts_repo_url: https://nextcloud.github.io/all-in-one
+          charts_dir: helm-chart
+          mark_as_latest: false
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          CR_RELEASE_NAME_TEMPLATE: "helm-chart-{{ .Version }}"
+          CR_SKIP_EXISTING: true