Production optimization: Docker configuration and monitoring stack

🚀 Docker Production Optimizations:
- Chiseled Ubuntu base image for minimal attack surface
- Non-root user execution with security hardening
- Read-only filesystem with targeted writable volumes
- Resource limits (1GB RAM, 1 CPU) with health checks
- Multi-stage builds optimized for caching
- Zero-downtime deployment automation

🔍 Comprehensive Monitoring Stack:
- Prometheus metrics collection with custom rules
- Grafana dashboards for application visualization
- AlertManager with email notifications for critical events
- Fluentd centralized logging with retention policies
- Node Exporter + cAdvisor for system/container metrics
- Health check endpoint (/health) for container orchestration

📋 Production Deployment Ready:
- Complete deployment scripts with backup strategy
- Environment templates for secure configuration
- Performance monitoring and alerting rules
- Enterprise-grade security and observability

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

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

.env.production.template

@@ -0,0 +1,22 @@
+# Production Environment Configuration
+# Copy this file to .env and fill in the actual values
+
+# JWT Configuration
+JWT_SECRET_KEY=your-super-secret-jwt-key-that-is-at-least-32-characters-long
+
+# BTCPay Server Configuration
+BTCPAY_SERVER_URL=https://your-btcpay-server.com
+BTCPAY_STORE_ID=your-store-id
+BTCPAY_API_KEY=your-api-key
+BTCPAY_WEBHOOK_SECRET=your-webhook-secret
+
+# Optional: Database Connection (defaults to SQLite in container)
+# CONNECTION_STRING=Data Source=/app/data/littleshop.db
+
+# Optional: Logging Configuration
+# LOG_LEVEL=Information
+# LOG_RETENTION_DAYS=30
+
+# Optional: Application Configuration
+# ASPNETCORE_ENVIRONMENT=Production
+# ALLOWED_HOSTS=littleshop.silverlabs.uk