feat: Add helm chart for the app (#65)

.github/workflows/release.yml

@@ -32,10 +32,55 @@ jobs:
           platforms: linux/amd64,linux/arm64
           tags: |
             ghcr.io/${{ github.actor }}/3proxy:latest
-            ghcr.io/${{ github.actor }}/3proxy:${{ steps.slug.outputs.version-semantic }}
+            ghcr.io/${{ github.actor }}/3proxy:${{ steps.slug.outputs.version }}
             ghcr.io/${{ github.actor }}/3proxy:${{ steps.slug.outputs.version-major }}.${{ steps.slug.outputs.version-minor }}
             ghcr.io/${{ github.actor }}/3proxy:${{ steps.slug.outputs.version-major }}
             docker.io/tarampampam/3proxy:latest
-            docker.io/tarampampam/3proxy:${{ steps.slug.outputs.version-semantic }}
+            docker.io/tarampampam/3proxy:${{ steps.slug.outputs.version }}
             docker.io/tarampampam/3proxy:${{ steps.slug.outputs.version-major }}.${{ steps.slug.outputs.version-minor }}
             docker.io/tarampampam/3proxy:${{ steps.slug.outputs.version-major }}
+
+  helm-pack:
+    name: Pack the Helm chart
+    runs-on: ubuntu-latest
+    defaults: {run: {working-directory: ./deployments/helm}}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: azure/setup-helm@v4
+      - {uses: gacts/github-slug@v1, id: slug}
+      - run: |
+          helm package \
+            --app-version "${{ steps.slug.outputs.version }}" \
+            --version "${{ steps.slug.outputs.version }}" .
+      - uses: actions/upload-artifact@v4
+        with:
+          name: helm-chart
+          path: ./deployments/helm/*.tgz
+          if-no-files-found: error
+          retention-days: 1
+
+  helm-publish:
+    name: Put the Helm chart to the GitHub pages branch
+    runs-on: ubuntu-latest
+    needs: [helm-pack]
+    steps:
+      - {uses: actions/checkout@v4, with: {ref: gh-pages}}
+      - uses: azure/setup-helm@v4
+      - uses: actions/download-artifact@v4
+        with: {name: helm-chart, path: ./helm-charts}
+      - name: Update the index.yaml
+        run: |
+          helm repo index \
+            --url https://${{ github.actor }}.github.io/${{ github.event.repository.name }}/helm-charts/ \
+            --merge \
+            ./helm-charts/index.yaml \
+            ./helm-charts
+      - uses: yKicchan/generate-directory-listing-action@v1
+        with: {target: ., ignore: "**/index.html", override: true}
+      - name: Commit and push the changes
+        run: |
+          git config user.name "${{ github.actor }}"
+          git config user.email "${{ github.actor }}@users.noreply.github.com"
+          git add .
+          git commit -m "Helm chart release"
+          git push origin gh-pages