Notes on Cloudflare, Kong Gateway, Docker, and self-hosting.https://luozhouyang.com/enhttps://luozhouyang.com/e-commerce/data-model-carts/https://luozhouyang.com/e-commerce/data-model-carts/Why a shopping cart needs both userId and sessionId, why cart items don't store prices, and how to handle cart expiry without a cron job.Mon, 27 Jul 2026 16:25:38 GMThttps://luozhouyang.com/e-commerce/data-model-checkout-sessions/https://luozhouyang.com/e-commerce/data-model-checkout-sessions/Why you need a local checkout session table between your business logic and the payment gateway — and why gateway metadata is a trap.Mon, 27 Jul 2026 16:25:38 GMThttps://luozhouyang.com/e-commerce/data-model-orders/https://luozhouyang.com/e-commerce/data-model-orders/Designing an order table that survives payment gateway switches, fulfillment failures, and the eternal floating-point money bug.Mon, 27 Jul 2026 16:25:38 GMThttps://luozhouyang.com/e-commerce/data-model-products/https://luozhouyang.com/e-commerce/data-model-products/Why a product table for an Amazon-FBA indie store looks nothing like a generic e-commerce schema — and the thinking behind every column.Mon, 27 Jul 2026 16:25:38 GMThttps://luozhouyang.com/e-commerce/data-model-shipments/https://luozhouyang.com/e-commerce/data-model-shipments/How to model shipments when fulfillment happens outside your system — tracking Amazon FBA orders, syncing carrier events, and knowing when to send the delivery email.Mon, 27 Jul 2026 16:25:38 GMThttps://luozhouyang.com/e-commerce/collapsible-navigation-groups/https://luozhouyang.com/e-commerce/collapsible-navigation-groups/How to restructure a flat admin sidebar into collapsible navigation groups with localStorage persistence and route-aware auto-expansion.Mon, 27 Jul 2026 16:16:28 GMThttps://luozhouyang.com/e-commerce/contact-form-on-cloudflare-workers/https://luozhouyang.com/e-commerce/contact-form-on-cloudflare-workers/Design a customer contact form with rate limiting, email notifications, and admin management — running entirely on Cloudflare Workers and D1.Mon, 27 Jul 2026 16:16:28 GMThttps://luozhouyang.com/e-commerce/email-capture-and-discount-codes/https://luozhouyang.com/e-commerce/email-capture-and-discount-codes/Design a homepage marketing system with email subscription popups, welcome discount codes, and server-side validation — without a marketing platform.Mon, 27 Jul 2026 16:16:28 GMThttps://luozhouyang.com/e-commerce/payment-gateway-on-cloudflare-workers/https://luozhouyang.com/e-commerce/payment-gateway-on-cloudflare-workers/Design a switchable Stripe + PayPal payment gateway abstraction on Cloudflare Workers with D1, encrypted credentials, and unified checkout sessions.Mon, 27 Jul 2026 16:16:28 GMTpaymentstripepaypalcloudflareworkerse-commercehttps://luozhouyang.com/e-commerce/transactional-email-on-cloudflare-workers/https://luozhouyang.com/e-commerce/transactional-email-on-cloudflare-workers/Build a reliable transactional email system on Cloudflare Workers using worker-mailer, React Email templates, D1-backed retry, and HMAC-signed order links.Mon, 27 Jul 2026 16:16:28 GMTcloudflareworkersemailsmtpreact-emailhttps://luozhouyang.com/kong/docker-deploy/https://luozhouyang.com/kong/docker-deploy/Deploy Kong Gateway on Docker and secure Kong Manager UI access.Thu, 20 Nov 2025 00:00:00 GMTkongdockerhttps://luozhouyang.com/cloudflare/wrangler-tips/https://luozhouyang.com/cloudflare/wrangler-tips/A few tips for using the Cloudflare Wrangler CLI.Thu, 07 Aug 2025 00:00:00 GMTcloudflarewranglerhttps://luozhouyang.com/cloudflare/r2-image-hosting/https://luozhouyang.com/cloudflare/r2-image-hosting/A guide to building an image hosting platform with Cloudflare R2Thu, 31 Jul 2025 00:00:00 GMTcloudflarer2https://luozhouyang.com/kong/introduction/https://luozhouyang.com/kong/introduction/Kong Gateway is one of the most widely used API Gateways.Tue, 29 Jul 2025 00:00:00 GMTkongapi-gateway