ci(package): login to registry

.github/workflows/package-pr.yaml

@@ -17,6 +17,13 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+      
+      - name: Login to GitHub registry
+        uses: docker/login-action@v1
+        with:
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+          registry: docker.pkg.github.com
           
       - name: Build Packages
         run: |