Complete setup and integration of my eCommerce website (HTML + JS + JSON backend system) I have a ready website project built in HTML, CSS, and JavaScript that uses JSON files as a lightweight database. The website includes product categories, cart, checkout page, and an admin panel (management dashboard). I need a professional developer to: Fix and finalize all functionality so everything works smoothly. Ensure the checkout page syncs prices correctly with the products in the JSON files. Make sure that when a customer completes an order, the system: Sends an automatic confirmation email to the customer with the full order details. Sends an email notification to me (the admin) with the order information. Sends a WhatsApp message to notify about the new order. Displays a real-time notification in the admin panel (live alert that a new order has been received). Ensure all product data (from JSON) is displayed properly in all categories and subcategories. Make sure that the admin panel correctly receives, displays, and manages the orders (status updates, order list, etc.). Verify that the website is fully functional on my hosting (upload, connection, and file synchronization). I will provide: The full project ZIP file A detailed guide explaining the structure of all files and functions The hosting details (for upload and testing) The goal: To make the website fully functional for real customers — from browsing and ordering to admin notifications and order management — using the current codebase (no need for new design).