ADVANCED • Scalability and Performance

Validation and Contract Checkpoint #3

This lesson targets enforce strict input validation in a realistic inventory synchronization service workflow. You will practice commands: docker compose up -d | prom-client register.metrics() | webhook signature verification. The code example is specific to backend API engineering tasks for this lesson objective.

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If this never completes: start PostgreSQL, check DATABASE_URL and DIRECT_URL in .env, run npx prisma db push. Optional: set SKIP_RUNTIME_CATALOG_SEED=1 to skip heavy catalog seed while debugging.