update readme with Node.js compatibility

README.md

@@ -81,6 +81,10 @@ CyberChef is built to support
  - Mozilla Firefox 35+
  - Microsoft Edge 14+
 
+## Node.js support
+
+CyberChef is built to fully support Node.js `v10` and partially supports `v12`. Named imports using a deep import specifier does not work in `v12`. For more information, see the Node API page in the project [wiki pages](https://github.com/gchq/CyberChef/wiki)
+
 
 ## Contributing