Fix domain configuration and database cleanup for production deployment

- Fixed domain extraction logic in start.sh for proper homeserver configuration
- Updated registration file regex patterns to use base domain
- Added comprehensive database cleanup procedures in CLAUDE.md
- Updated CloudronManifest.json for production settings
- Resolved crypto sync issues and user registration conflicts

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

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

CLAUDE.md

@@ -18,6 +18,16 @@ make build
 make package
 ```
 
+### Custom Cloudron Build Service
+```bash
+cloudron build --set-build-service builder.docker.due.ren --build-service-token e3265de06b1d0e7bb38400539012a8433a74c2c96a17955e --set-repository andreasdueren/matrix-whatsapp-bridge --tag [version]
+```
+
+### Remote Installation
+```bash
+cloudron install --location whatsapp.matrix.due.ren --image andreasdueren/matrix-whatsapp-bridge:1.1.0
+```
+
 ### Development deployment
 ```bash
 make dev-install    # Install on test Cloudron