chore: restore MultiViews and add all required Apache modules

- Restore MultiViews option in Directory configuration
- Add headers, rewrite, dir, and mime modules to enable script
- Keep remoteip and env modules for Traefik integration

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

apache/nextcloud.conf

@@ -9,7 +9,7 @@ RemoteIPTrustedProxy 192.168.0.0/16
 SetEnvIf X-Forwarded-Proto "https" HTTPS=on
 
 <Directory /var/www/html/>
-    Options +FollowSymLinks
+    Options FollowSymLinks MultiViews
     AllowOverride All
     Require all granted