AliExpress Price-Stock Monitor

I need a web-based bot that keeps an eye on any AliExpress product links I feed it, checks those pages every time I request, and lets me know immediately when the price moves or the item goes out of stock. The alerts must reach me by Email and Push notifications—no SMS needed.

Please build a small interface where I can paste or upload a list of product URLs (100000 items). Behind the scenes the script should fetch the latest data, compare it with the previous snapshot, and trigger an alert only when there is a real change.

Preferred stack is flexible (Python + BeautifulSoup/Scrapy, or Node.js with Puppeteer, etc.) as long as it is reliable and can be hosted on a standard VPS. I will handle the server; you hand over the full source code, a requirements file, and a short read-me so I can deploy it quickly.

Acceptance criteria
• Web interface loads in any modern browser.
• Product list unlimited in theory, efficiently handled in practice.
• Checks with manual refresh.
• Email and Push notifications arrive within 1–2 minutes of a detected change and include the product title, old price, new price, stock status, and the product link.
• Code is commented, clean, and ready to extend later.

If this sounds clear, let me know your preferred tools and estimated turnaround, and we can get started right away.