chore(readme): bit more explicit about nodejs

README.md

@@ -6,7 +6,7 @@
 
 <br/>
 
-<p align="center">A JavaScript/Typescript SDK for <a href="https://blockfrost.io">Blockfrost.io</a> API.</p>
+<p align="center"><a href="https://blockfrost.io">Blockfrost.io</a> SDK for JavaScript for Node.js.</p>
 <p align="center">
   <a href="#getting-started">Getting started</a> •
   <a href="#installation">Installation</a> •
@@ -15,14 +15,14 @@
 <br>
 
 ## Getting started
-
 To use this SDK, you first need to log in to [blockfrost.io](https://blockfrost.io), create your project and retrieve the API token.
 
 <img src="https://i.imgur.com/smY12ro.png">
 
 <br/>
 
 ## Installation
+To run the SDK you need Node.js version 14 and higher. While you may find a way to run it directly in a browser, we don't actively support or provide troubleshooting assistance with this scenario. We recommend setting up your own Node.js backend. Exposing your API keys in a frontend application is almost always a bad idea.
 
 The SDK is hosted on [npmjs.com](https://www.npmjs.com/package/@blockfrost/blockfrost-js), so you can directly import it using your favorite package manager.