From Failure to Production: Mastering Multi-Container Deployment with Docker Compose

This article reveals the real-world challenges of containerized deployments by documenting actual failures and debugging processes required when orchestrating Flask, PostgreSQL, NGINX, and Gunicorn. Rather than presenting an idealized walkthrough, it provides pragmatic troubleshooting strategies and architectural insights essential for engineers managing complex multi-service applications. Understanding these common failure patterns and remediation approaches is critical for teams transitioning from single-service to production-grade containerized infrastructure.