Update dockercontainer-build.yml

Author: LenBanana

.github/workflows/dockercontainer-build.yml

@@ -33,6 +33,9 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     if: github.event_name == 'push'
+    permissions:
+      contents: read
+      packages: write
     steps:
       - name: Checkout code
         uses: actions/checkout@v2