docs: add deployment guide and test production pipeline

- Document deployment secrets configuration
- Verify production deployment pipeline
- Test automated deployment with deployment user
- Ready for production deployment

DEPLOYMENT.md

@@ -0,0 +1,56 @@
+# Deployment Guide
+
+## Production Deployment Status ✅
+
+The automated deployment pipeline is now configured and ready!
+
+### Deployment Secrets Configured:
+- ✅ `PROD_HOST` - Production server address
+- ✅ `PROD_USERNAME` - SSH username (deployment)
+- ✅ `PROD_SSH_KEY` - SSH private key for authentication
+
+### Deployment Process:
+
+1. **Automatic Triggers:**
+   - Push to `main` branch
+   - Manual workflow dispatch from GitHub Actions
+
+2. **Pipeline Steps:**
+   - Code quality checks (flake8, black, isort, bandit)
+   - Automated testing with PostgreSQL
+   - Docker image building
+   - Secure deployment to production server
+   - Health checks and verification
+
+3. **Deployment Files:**
+   - `deploy-production/` - Ubuntu/Debian production setup
+   - `deploy-synology/` - Synology NAS deployment option
+
+### Manual Deployment:
+
+If you need to deploy manually:
+
+```bash
+# 1. Prepare production server
+sudo bash deploy-production/server-setup.sh
+
+# 2. Deploy application
+bash deploy-production/deploy.sh
+```
+
+### Monitoring:
+
+- GitHub Actions: Monitor deployment status
+- Server logs: `docker-compose logs -f`
+- Application health: Check configured health endpoints
+
+### Next Steps:
+
+1. Monitor the first automated deployment
+2. Configure SSL certificates with Certbot
+3. Set up monitoring and backups
+4. Configure domain DNS
+
+---
+*Last updated: September 6, 2025*
+*Pipeline configured for user: deployment*