feat(chart): release security and workflow updates

.github/workflows/helm-publish.yml

@@ -0,0 +1,64 @@
+name: Publish charts
+permissions: read-all
+on:
+  push:
+    tags: [ "helm-v*" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  publish-helm:
+    # Skip this Release on forks
+    if: github.repository_owner == 'capsuleproject'
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
+      - name: Publish Helm chart
+        uses: stefanprodan/helm-gh-pages@0ad2bb377311d61ac04ad9eb6f252fb68e207260 # v1.7.0
+        with:
+          token: "${{ secrets.GITHUB_TOKEN }}"
+          linting: off
+          charts_dir: charts
+          charts_url: https://${{ github.repository_owner }}.github.io/charts
+          owner: ${{ github.repository_owner }}
+          repository: charts
+          branch: gh-pages
+          commit_username: ${{ github.actor }}
+  publish-helm-oci:
+    runs-on: ubuntu-20.04
+    permissions:
+      contents: write
+      id-token: write
+      packages: write
+    outputs:
+      chart-digest: ${{ steps.helm_publish.outputs.digest }}
+    steps:
+      - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
+      - uses: sigstore/cosign-installer@11086d25041f77fe8fe7b9ea4e48e3b9192b8f19 # v3.1.2
+      - name: Helm | Publish
+        id: helm_publish
+        uses: oliverbaehler/github-actions/helm-oci-chart@8dfd42735c85f6c58d5d4d6f3232cd0e39d1fe73 # v0.1.0
+        with:
+          registry: ghcr.io
+          repository: ${{ github.repository_owner }}/charts
+          name: "capsule"
+          registry-username: ${{ github.actor }}
+          registry-password: ${{ secrets.GITHUB_TOKEN }}
+          update-dependencies: 'true' # Defaults to false
+          sign-image: 'true'
+          signature-repository: ghcr.io/${{ github.repository_owner }}/signatures
+  helm-provenance:
+    needs: publish-helm-oci
+    permissions:
+      id-token: write   # To sign the provenance.
+      packages: write   # To upload assets to release.
+      actions: read     # To read the workflow path.
+    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_container_slsa3.yml@v1.9.0
+    with:
+      image: ghcr.io/${{ github.repository_owner }}/charts/capsule
+      digest: "${{ needs.publish-helm-oci.outputs.chart-digest }}"
+      registry-username: ${{ github.actor }}
+    secrets:
+      registry-password: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/helm-test.yml

@@ -0,0 +1,69 @@
+name: Test charts
+permissions: {}
+
+on:
+  pull_request:
+    branches: [ "main" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
+        with:
+          fetch-depth: 0
+      - uses: azure/setup-helm@5119fcb9089d432beecbf79bb2c7915207344b78 # v3
+      - name: Linting Chart
+        run: helm lint ./charts/capsule
+      - name: Setup Chart Linting
+        id: lint
+        uses: helm/chart-testing-action@e8788873172cb653a90ca2e819d79d65a66d4e76 # v2.4.0
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --config ./.github/configs/ct.yaml)
+          if [[ -n "$changed" ]]; then
+            echo "::set-output name=changed::true"
+          fi
+      - name: Run chart-testing (lint)
+        run: ct lint --debug --config ./.github/configs/ct.yaml --lint-conf ./.github/configs/lintconf.yaml
+      - name: Run docs-testing (helm-docs)
+        id: helm-docs
+        run: |
+          make helm-docs
+          if [[ $(git diff --stat) != '' ]]; then
+            echo -e '\033[0;31mDocumentation outdated! (Run make helm-docs locally and commit)\033[0m ❌'
+            git diff --color
+            exit 1
+          else
+            echo -e '\033[0;32mDocumentation up to date\033[0m ✔'
+          fi
+
+      # ATTENTION: This is a workaround for the upcoming ApiVersion Conversions for the capsule CRDs
+      # With this workflow the current docker image is build and loaded into kind, otherwise the install fails
+      # In the future this must be removed and the chart-testing-action must be used
+      - name: Run chart-testing (install)
+        run: make helm-test
+        if: steps.list-changed.outputs.changed == 'true'
+
+      ## Create KIND Cluster
+      - name: Create kind cluster
+        uses: helm/kind-action@dda0770415bac9fc20092cacbc54aa298604d140 # v1.8.0
+        if: steps.list-changed.outputs.changed == 'true'
+      # Install Required Operators/CRDs
+      - name: Prepare Cluster Operators/CRDs
+        run: |
+          # Cert-Manager CRDs
+          kubectl create -f https://github.com/cert-manager/cert-manager/releases/download/v1.9.1/cert-manager.crds.yaml
+          
+          # Prometheus CRDs
+          kubectl create -f https://github.com/prometheus-operator/prometheus-operator/releases/download/v0.58.0/bundle.yaml
+        if: steps.list-changed.outputs.changed == 'true'
+      # Install Charts
+      - name: Run chart-testing (install)
+        run: ct install --debug --config ./.github/configs/ct.yaml
+        if: steps.list-changed.outputs.changed == 'true'