add helm chart testing action and ct config

.github/workflows/helm.yaml

@@ -0,0 +1,49 @@
+name: Lint and Test Charts
+
+on: pull_request
+
+defaults:
+    run:
+        working-directory: helm/vigilo
+
+jobs:
+  helm-lint-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v3
+        with:
+          version: v3.14.0
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+          check-latest: true
+
+      - name: Set up chart-testing
+        uses: helm/[email protected]
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --config ./charts/ct-config.yaml)
+          if [[ -n "$changed" ]]; then
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Run chart-testing (lint)
+        if: steps.list-changed.outputs.changed == 'true'
+        run: ct lint --config ./charts/ct-config.yaml
+
+      - name: Create kind cluster
+        if: steps.list-changed.outputs.changed == 'true'
+        uses: helm/[email protected]
+
+      - name: Run chart-testing (install)
+        if: steps.list-changed.outputs.changed == 'true'
+        run: ct install --config ./charts/ct-config.yaml

charts/ct-config.yaml

@@ -0,0 +1,5 @@
+charts-dir:
+  - charts
+helm-extra-args: "--timeout=5m"
+target-branch: main
+validate-maintainers: false