Deploy existing web app to my own Cloudflare + GitHub + Supabase (migration, code already built)

DESCRIPTION: I have a web application that is already built and currently live. The complete codebase is in my possession (includes package.json, wrangler.toml, a Supabase folder, and environment config). I need an experienced Cloudflare developer to redeploy it onto NEW accounts that I own, and point my domain to it — with zero downtime to the current live site. This is a contained migration, not a build. The code exists. I need it stood up cleanly on infrastructure under my control. SCOPE OF WORK: 1. Review the existing codebase and config, and confirm what the deployment requires (this is the first milestone). 2. Deploy the app to a NEW Cloudflare account (mine) using the existing Wrangler config. 3. Connect the existing Supabase backend and environment variables. 4. Get it running on a preview/staging URL so I can verify it before any domain change. 5. Point my domain (registrar access is mine) to the new deployment. 6. Confirm the live site loads, SSL is valid, and core functionality (forms / checkout) works end to end. REQUIREMENTS: - Demonstrated experience with Cloudflare (Workers/Pages), Wrangler, and Supabase — please link relevant past jobs, not general "web design" work. - Comfortable working from existing code and credentials I provide. - You'll be added as a COLLABORATOR with scoped access; I retain full ownership and revoke access on completion. Credentials shared via a secure channel, never in chat. HOW I'D LIKE TO STRUCTURE IT: - Milestone 1 (small, fixed): review my code/config and tell me what the full deployment will take and cost. - Milestone 2: the deployment + domain + verification, agreed after your review. Please start your reply with the word CLOUDFLARE so I know you read the post. In one or two sentences, tell me the most common reason a redeploy like this hits a snag — I want to know you've actually done this before. Availability this weekend / early this week is a strong plus.