Only publish the the docker images on the main repo's master

Author: mrzzy

.github/workflows/ci-pipeline.yml

@@ -48,7 +48,7 @@ jobs:
       
   ## release pipeline - run only on main repo
   publish-containers:
-    #if: github.repository == "np-overflow/k8s-cms" && github.head_ref == "master"
+    if: github.repository == "np-overflow/k8s-cms" && github.head_ref == "master"
     runs-on: ubuntu-18.04
     needs: 
      - build-containers