chore: update readme

Author: iKristy

README.md

@@ -1,21 +1,34 @@
-# Essential Next.js (Experimental)
+![Next.js on Netlify Build Plugin](next-on-netlify.png)
 
-_Experimental plugin for Next.js applications on Netlify_
+# Essential Next.js Build Plugin (beta)
 
-:warning: This plugin is an alpha for testing purposes only. It is not yet stable and should not be used for production sites.
 
-## Installing the alpha
+:warning: This is the beta version of the Essential Next.js plugin. For the stable version, see [Essential Next.js plugin v3](https://github.com/netlify/netlify-plugin-nextjs/tree/v3#readme) :warning:
+
+<p align="center">
+  <a aria-label="npm version" href="https://www.npmjs.com/package/@netlify/plugin-nextjs">
+    <img alt="" src="https://img.shields.io/npm/v/@netlify/plugin-nextjs">
+  </a>
+  <a aria-label="MIT License" href="https://img.shields.io/npm/l/@netlify/plugin-nextjs">
+    <img alt="" src="https://img.shields.io/npm/l/@netlify/plugin-nextjs">
+  </a>
+</p>
+
+
+## Installing the beta
+
 
-- Remove the existing Essential Next.js plugin (`@netlify/plugin-nextjs`). See the instructions to [uninstall the plugin](https://ntl.fyi/remove-plugin)
 - Install the module:
 ```shell
-npm install -D @netlify/plugin-nextjs-experimental
+npm install -D @netlify/plugin-nextjs@beta
 ```
-- Change the `publish` directory to `.next`  and add the plugin to `netlify.toml`:
+- Change the `publish` directory to `.next`  and add the plugin to `netlify.toml` if not already installed:
 ```toml
 [build]
 publish = ".next"
 
 [[plugins]]
-package = "@netlify/plugin-nextjs-experimental"
+package = "@netlify/plugin-nextjs"
 ```
+
+If you previously set `target: "serverless"` in your `next.config.js` this is no longer needed and can be removed.