Building Confidence with Testcontainers

Modern Node.js applications rarely live in isolation. They depend on databases, caches, message brokers, and third-party APIs. Unit tests validate business logic, but they cannot guarantee everything will still work once your service runs in a real environment with real dependencies. This is where Testcontainers comes in: it lets you run integration tests against real services inside disposable Docker containers, both locally and in CI. The Classic Deployment Failure Scenario Story generated wit