# Containerizing a Broken Microservices App and Shipping It with a Full CI/CD Pipeline

Short summary

This DevOps tutorial walks through debugging a distributed job-processing microservices app, identifying issues like hardcoded localhost references and Redis queue naming mismatches, then containerizing all services with production-quality Docker patterns. Coverage includes multi-stage builds, non-root user execution, health checks, and Docker Compose networking with service dependencies. The full CI/CD pipeline validates code through lint, tests, security scanning, and rolling deployment in strict order.

• •Found and fixed critical bugs (localhost DNS, queue naming, __name__ typo)
• •Built production-grade Dockerfiles with multi-stage builds and non-root users
• •Implemented complete CI/CD pipeline with health checks and resource limits

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