feat: add health check endpoint and Docker health monitoring

Add a /health endpoint to the application controller and configure Docker health checks.
This enables container orchestration systems to monitor the application's liveness and readiness.

docker-compose.yml

@@ -9,3 +9,9 @@ services:
     environment:
       - PORT=3000
       - NODE_ENV=production
+    healthcheck:
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:3000/health"]
+      interval: 30s
+      timeout: 3s
+      retries: 3
+      start_period: 5s