improve node app``

MY BUDGET IS $50 / 3 DAYS! PLS DO NOT BID WITH PLACEHOLDERS BUDGETS & TIMELINES. I have a js script that (1) uses regex to guess valid domains and (2) save the domain output to MongoDB. Now, I want to improve the script by (1) using similar logic the guess valid email addresses, (2) adding additional data fields to the email and domain, and (3) outputing the data in my [login to view URL] application based on my user's search input and payment plan, and (4) downloading the requested data to the user's computer an a CSV file. The project requires, node.js, [login to view URL], regex, stripe, mongodb, and mongoose. Basically, we will use node.js for the backend and [login to view URL] for the frontend. The frontend of the app is already deployed to Vercel. If you can deploy the backend, I can increase the budget a bit. PLEASE SEE THE VIDEO HERE: [login to view URL] K Thanks.