set node version for netlify deployment

README.md

@@ -28,6 +28,6 @@ npm run dev:functions
 
 Clicking on the below button will guide you through the deployment process and also create a copy of the repository in your account.
 
-[![Deploy to Netlify](https://www.netlify.com/img/deploy/button.svg)](https://app.netlify.com/start/deploy?repository=https://github.com/kontent-ai/data-ops-gui/)
+[![Deploy to Netlify](https://www.netlify.com/img/deploy/button.svg)](https://app.netlify.com/start/deploy?repository=https://github.com/kontent-ai/data-ops-gui#NODE_VERSION=20)
 
 The tool makes use of Netlify functions to invoke `data-ops` methods. Deployment on other platforms requires adjustment to the API layer.