doc: Added nearform banner (#160)

Author: ludovicobesana

README.md

@@ -29,3 +29,5 @@ Run tests using the custom reporter:
 ```sh
 node --test --test-reporter ./reporter.js
 ```
+
+[![banner](https://raw.githubusercontent.com/nearform/.github/refs/heads/master/assets/os-banner-green.svg)](https://www.nearform.com/contact/?utm_source=open-source&utm_medium=banner&utm_campaign=os-project-pages)