chore(readme): improve publishing docs

README.md

@@ -69,8 +69,19 @@ Add the following to your `.npmrc`.
 message="chore(release): bump version to v%s"
 # if you want to sign the tag
 sign-git-tag=true
+
+@d-ptb:registry=https://gitlab1.ptb.de/api/v4/packages/npm/
+
+# the following auth token should be a private one with write permission for the package registry
+//gitlab1.ptb.de/api/v4/projects/:_authToken=<token>
+//gitlab1.ptb.de/api/v4/packages/npm/:_authToken=<token>
+//gitlab1.ptb.de/api/v4/projects/105/packages/npm/:_authToken=<token>
+
 ```
 
+
+### Publishing workflow
+
 1. Commit all changes
 2. Bump the version with `npm version [major | minor | patch | ...]`
 3. Push all commits to the remote