test: improve e2e verdaccio configuration

```
lerna notice total files:   64                                      
775
lerna notice 
776
lerna ERR! E503 one of the uplinks is down, refuse to publish
777
error Command failed with exit code 1.
778
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
779
Error: Process completed with exit code 1.
```

admin/verdaccio.yaml

@@ -13,11 +13,21 @@
 
 storage: ../storage
 
+publish:
+  allow_offline: false
+
 # A list of other known repositories we can talk to
 uplinks:
   npmjs:
     url: https://registry.npmjs.org/
 packages:
+  '@docusaurus/*':
+    access: $all
+    publish: $all
+  '@*/*':
+      access: $all
+      publish: $authenticated
+      proxy: npmjs    
   '**':
     # Allow all users (including non-authenticated users) to read and
     # publish all packages