docs: update Gitea link and add Buy Me a Coffee section

- Update footer Gitea link from agentic-coding-starter-kit to nextjs-boilerplate
- Add Buy Me a Coffee section to README with PayPal donation link

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -11,7 +11,11 @@ A complete agentic coding boilerplate with authentication, PostgreSQL database,
 - **⚡ Modern Stack**: Next.js 15, React 19, TypeScript
 - **📱 Responsive**: Mobile-first design approach
 
+## ☕ Buy Me a Coffee
 
+If you find this project helpful and would like to support my work, consider buying me a coffee! Your support helps me maintain and improve this boilerplate.
+
+[Buy Me a Coffee](https://paypal.me/rosmoscato)
 
 ## 📋 Prerequisites
 

src/components/site-footer.tsx

@@ -5,7 +5,7 @@ export function SiteFooter() {
       <div className="container mx-auto px-4">
         <div className="flex flex-col items-center space-y-3">
           <a
-            href="https://gitea.rosmoscato.xyz/ros/agentic-coding-starter-kit"
+            href="https://gitea.rosmoscato.xyz/ros/nextjs-boilerplate"
             target="_blank"
             rel="noopener noreferrer"
             className="text-primary hover:underline"