Update relay server defaults and repo links

- Update index.html links to repo.anhonesthost.net
- Adjust rate limit defaults in .env.example

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

macropad-relay/public/index.html

@@ -163,11 +163,11 @@
         </div>
 
         <div class="cta">
-            <a href="https://github.com/ShadowDaoLabs/MacroPad" target="_blank">Learn More</a>
+            <a href="https://repo.anhonesthost.net/MacroPad/MP-Server" target="_blank">Learn More</a>
         </div>
 
         <p class="footer">
-            Part of the <a href="https://github.com/ShadowDaoLabs/MacroPad" target="_blank">MacroPad</a> project
+            Part of the <a href="https://repo.anhonesthost.net/MacroPad/MP-Server" target="_blank">MacroPad</a> project
         </p>
     </div>
 </body>