#nodejs

Mocking databases in unit tests leads to false confidence. Learn how to use Testcontainers to spin up real Docker databases for reliable integration testing.

Discover how the N+1 query problem silently kills your application's performance and learn how to solve it permanently using DataLoader for efficient batching.

Learn how to validate Node.js environment variables at startup using Zod. Prevent hidden crashes and build type-safe, bulletproof configuration files.