docs: updated readme about how to publish new version

Author: jackyef

README.md

@@ -20,4 +20,9 @@ The example (a [razzle](https://github.com/jaredpalmer/razzle) app) by default w
 
 ### Documentations [![Netlify Status](https://api.netlify.com/api/v1/badges/81844630-ff7d-4bf6-95f0-9f170ba6e421/deploy-status)](https://app.netlify.com/sites/unruffled-austin-36e969/deploys)
 
-The documentations live at:  https://react-isomorphic-data.netlify.com/
+The documentations live at:  https://react-isomorphic-data.netlify.com/
+
+### Publishing new version
+```
+GH_TOKEN=<your-github-token> yarn deploy
+```