enable chart push to ghcr as oci artifact (#523)

Signed-off-by: ishuar <[email protected]>

.github/workflows/release.yml

@@ -5,16 +5,25 @@ on:
     branches:
       - main
 
+permissions:
+  contents: write
+  packages: write ## needed for ghcr access
+
 jobs:
   release:
     if: github.repository == 'vmware-tanzu/helm-charts'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
+      - name: Install Helm
+        uses: azure/setup-helm@v3
+        with:
+          version: 3.13.2
+
       - name: Configure Git
         run: |
           git config user.name "$GITHUB_ACTOR"
@@ -24,3 +33,20 @@ jobs:
         uses: helm/[email protected]
         env:
           CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push Charts to GHCR
+        run: |
+          for pkg in .cr-release-packages/*; do
+            if [ -z "${pkg:-}" ]; then
+              break
+            fi
+
+            helm push "${pkg}" oci://ghcr.io/${GITHUB_REPOSITORY_OWNER}/charts
+          done