feat: add OCI registry support for Helm chart

.github/workflows/release.yaml

@@ -6,7 +6,7 @@ on:
     branches:
       - master
     paths:
-      - 'charts/**'
+      - "charts/**"
 
 jobs:
   release:
@@ -27,5 +27,20 @@ jobs:
       - name: Run chart-releaser
         uses: helm/chart-releaser-action@v1.6.0
         env:
-          CR_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
           CR_SKIP_EXISTING: true
+      - name: Login to GHCR
+        uses: docker/login-action@v3.0.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Push charts to GHCR
+        run: |
+          shopt -s nullglob
+          for pkg in .cr-release-packages/*.tgz; do
+            if [ -z "${pkg:-}" ]; then
+              break
+            fi
+            helm push "${pkg}" "oci://ghcr.io/${GITHUB_REPOSITORY_OWNER}/helm-charts"
+          done