Deploy MERN E-Commerce Site

My e-commerce store is finished in the MERN stack and I’m ready to push it into production. I need a reliable deployment workflow that takes the React front-end and Node/Express API from my Git repo, connects them to the existing MongoDB database, and serves the whole application over HTTPS on a reliable host.

In addition, I have to enable a payment gateway so customers can start checking out immediately. Stripe is already wired up in development mode, so this job includes swapping in the live keys, testing transactions, and confirming that everything settles correctly in production.

What I expect at hand-off is a publicly accessible, SSL-secured site with the payment gateway fully operational and a short note explaining how to redeploy when I push future updates.