feat: chart testing and docs improvements

.github/workflows/helm.yml

@@ -12,11 +12,42 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
       - uses: azure/setup-helm@v1
         with:
           version: 3.3.4
       - name: Linting Chart
         run: helm lint ./charts/capsule
+      - name: Setup Chart Linting
+        id: lint
+        uses: helm/chart-testing-action@v2.3.0
+      - 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
+      # Create KIND Cluster
+      - name: Create kind cluster
+        uses: helm/kind-action@v1.2.0
+        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'
   release:
     if: startsWith(github.ref, 'refs/tags/helm-v')
     runs-on: ubuntu-latest