KolbySisk/next-supabase-stripe-starter — reverse-engineered prompt

Build me a polished SaaS starter from this repo that I can actually use as a base for a real product. I want a clean landing page, sign in with email, user accounts, a pricing page with subscription plans, Stripe checkout, and a place for customers to manage their subscription in the billing portal. Please wire it up so product and subscription data stay in sync with the database through webhooks, and include the email flow for login links and other basic app emails.

Keep the UI modern, responsive, accessible, and ready to customize. Use the existing starter patterns instead of reinventing everything. I also want the setup to feel complete, so make sure the database migrations, sample product data, environment variables, and local development flow are all working. If there are placeholder values or cleanup steps in the repo, handle those too.

When you are done, leave me with a simple README or notes that explain how to run it locally, connect Supabase, Stripe, and Resend, and deploy it. Look up current docs online if you need to.