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>

LittleShop/Program.cs

@@ -89,6 +89,11 @@ builder.Services.AddScoped<ICustomerMessageService, CustomerMessageService>();
 builder.Services.AddScoped<IPushNotificationService, PushNotificationService>();
 builder.Services.AddScoped<IProductImportService, ProductImportService>();
 builder.Services.AddSingleton<ITelegramBotManagerService, TelegramBotManagerService>();
+
+// Health Checks
+builder.Services.AddHealthChecks()
+    .AddDbContextCheck<LittleShopContext>("database")
+    .AddCheck("self", () => Microsoft.Extensions.Diagnostics.HealthChecks.HealthCheckResult.Healthy("Application is healthy"));
 // Temporarily disabled to use standalone TeleBot with customer orders fix
 // builder.Services.AddHostedService<TelegramBotManagerService>();
 
@@ -225,6 +230,9 @@ app.MapControllerRoute(
 
 app.MapControllers(); // API routes
 
+// Health check endpoint
+app.MapHealthChecks("/health");
+
 // Apply database migrations and seed data
 using (var scope = app.Services.CreateScope())
 {