Init Helm chart (#255)

* Initial chart version

* Add CI/CD for chart

* Fix admin creds template

* Add command, args, env, envFrom

* Render volumes and volumeMounts with tpl

* Change persistance accessMode type

* Add update strategy config

* Use custom types in docs

* Add startup probe config

* Fix web.external_url config

.github/workflows/chart.yml

@@ -0,0 +1,84 @@
+# Publish chart to the GitHub Container Registry (GHCR) on push to master
+# Run the following tests on PRs:
+# - Check if chart's documentation is up to date
+# - Check chart linting
+# - Check chart installation in a Kind cluster
+# - Check chart packaging
+
+name: Chart
+
+on:
+  pull_request:
+    branches: [master]
+    paths: [deploy/helm]
+  push:
+    branches: [master]
+    paths: [deploy/helm]
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'pull_request' }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # ct lint requires Python 3.x to run following packages:
+      #  - yamale (https://github.com/23andMe/Yamale)
+      #  - yamllint (https://github.com/adrienverge/yamllint)
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
+
+      - uses: helm/chart-testing-action@v2
+
+      - name: Run chart-testing (lint)
+        run: ct lint --config ct.yaml
+
+      - name: Check docs
+        run: |
+          docker run --rm --volume "${PWD}/deploy:/helm-docs" -u "$(id -u)" jnorwood/helm-docs
+          if ! git diff --exit-code; then
+            echo "error::Documentation is not up to date. Please run helm-docs and commit changes."
+            exit 1
+          fi
+
+      - uses: helm/kind-action@v1
+
+      - name: Run chart-testing (install)
+        run: ct install --config ct.yaml
+
+      - name: Run helm package charts
+        run: |
+          for chart in $(ct list-changed --config ct.yaml); do
+            helm package $chart -d out
+          done
+
+  publish:
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'push' }}
+    permissions:
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: helm/chart-testing-action@v2
+      - name: Run helm package charts
+        run: |
+          for chart in $(ct list-changed --config ct.yaml); do
+            helm package $chart -d out
+          done
+
+      - name: Push chart to GHCR
+        working-directory: out
+        run: |
+          for pkg in $(ls *.tgz); do
+            helm push $pkg oci://ghcr.io/${{ github.repository_owner }}/charts
+          done