Update and rename blank.yml to keyless-sign.yml

.github/workflows/keyless-sign.yml

@@ -17,6 +17,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Log into ghcr.io
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.PERSONAL_ACCESS_TOKEN }}
       - name: Install Cosign
         uses: sigstore/cosign-installer@main
       - name: Build and Push container images