Clarifications — Shopify Product Update Webhook Service

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HMAC verification: Skipped — endpoint accepts any well-formed JSON, no Shopify signature check.
Data handling: Log the payload to stdout (structured JSON logging), return 200. No persistence, no downstream calls.
Dockerfile: Production-grade — multi-stage build, non-root user, health check, pinned versions.

Single endpoint: POST /webhooks/shopify/product-update
FastAPI app structure: app/ package with main.py (app factory) and routers/webhooks.py — standard FastAPI layout, not a single-file script
Pydantic model for the incoming payload — validates top-level Shopify product fields but doesn't validate every nested field (Shopify's schema is large and versioned; strict full validation is fragile)
GET /health endpoint for Docker health checks and load balancer probes
Python 3.12, pip (not Poetry/pdm — keeps the Dockerfile simpler)
Structured JSON logging via structlog — each webhook payload logged as a single JSON line for easy ingestion by log shippers
No retry queue, no background tasks — just receive, log, 200
No database, no docker-compose — single container
English-only error messages, no i18n