Update README with CI/CD pipeline documentation

Added comprehensive information about the Drone CI pipeline,
deployment servers, and automated migration process.

README.md

@@ -69,3 +69,21 @@ That's it! You now know how to install, run, and configure this Laravel project.
 
 ## Note
 Note that the server configuration should refer to `public/index.php`, not `server.php`
+
+## CI/CD Pipeline
+
+This repository uses Drone CI for automated testing and deployment:
+
+- **Test**: Composer validation and dependency installation
+- **Deploy to Staging**: Automatic deployment + migrations on push to `main` or `develop` branches
+- **Deploy to Production**: Manual promotion required + queue restart
+
+### Deployment Servers
+
+- **Staging**: 159.223.242.61 → `/var/www/laravel/current`
+- **Production**: 152.42.148.137 → `/var/www/laravel/current`
+- **Deployment Script**: `/opt/deploy-scripts/deploy-laravel.sh`
+
+Database migrations run automatically during deployment:
+- **Staging**: `php artisan migrate --force`
+- **Production**: `php artisan migrate --force` + `php artisan queue:restart`