chore: update .env.example, README, and package.json (#565)

Author: niyabits

example/nextjs-webpush/.env.example

@@ -1,6 +1,6 @@
-# MagicBell User Auth
+# MagicBell User Auth API Keys retrieved here: https://app.magicbell.com/projects/_/settings/user-auth
 MAGICBELL_API_KEY=
 MAGICBELL_SECRET_KEY=
 
-# MagicBell Project Auth
+# MagicBell Project Auth Token retrieved here: https://app.magicbell.com/projects/_/settings/project-auth
 MAGICBELL_PROJECT_TOKEN=

example/nextjs-webpush/README.md

@@ -4,6 +4,7 @@
 </a>
 <h1>MagicBell</h1>
 
+<a href="https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fmagicbell%2Fmagicbell-js%2Ftree%2Fmain%2Fexample%2Fnextjs-webpush&env=MAGICBELL_API_KEY,MAGICBELL_SECRET_KEY,MAGICBELL_PROJECT_TOKEN&envDescription=The%20template%20requires%20MagicBell%20API%20and%20Secret%20key%20for%20user%20authentication%20and%20the%20MagicBell%20Project%20Token%20for%20sending%20notifications.&envLink=https%3A%2F%2Fwww.magicbell.com%2Fdocs%2Fapi%2Fauthentication"><img src="https://vercel.com/button" alt="Deploy with Vercel"/></a>
 <a href="https://magicbell.com/docs"><img alt="Read the MagicBell Docs" src="https://img.shields.io/badge/Read%20the%20docs-23283B.svg?style=for-the-badge"></a>
 <a href="https://magicbell.to/community"><img alt="Discuss on GitHub" src="https://img.shields.io/badge/Discuss%20on%20GitHub-black.svg?style=for-the-badge&logo=github&labelColor=000000&logoWidth=20"></a>
 

example/nextjs-webpush/package.json

@@ -2,6 +2,7 @@
   "name": "webpush-ios-template",
   "version": "0.1.0",
   "private": true,
+  "packageManager": "[email protected]",
   "scripts": {
     "dev": "next dev --turbopack --experimental-https",
     "build": "next build",

example/nextjs-webpush/src/app/not-found.tsx

@@ -0,0 +1,13 @@
+import Link from 'next/link';
+
+export default function NotFound() {
+  return (
+    <div>
+      <h2 className="text-2xl font-bold text-amber-500">Not Found</h2>
+      <p>Could not find requested resource.</p>
+      <Link className="block mt-6 hover:underline hover:underline-offset-4" href="/">
+        Return Home
+      </Link>
+    </div>
+  );
+}