How to add image uploads to a Next.js SaaS using Cloudinary -- a protected API route, a reusable upload hook, and storing only the public_id in the database so transformation URLs stay flexible.
How to wire up transactional email in a Next.js SaaS using Resend and react-email -- from template components to service-layer sends and feature flags that keep the dev sandbox clean.
How to wire up Stripe subscription billing in a Next.js App Router SaaS -- from checkout session to webhook sync and customer portal -- in a single afternoon.