dgtlmoon/changedetection.io ? reverse-engineered prompt

I want to build a self-hosted tool for monitoring websites for changes. It should have a clean web interface where I can add URLs to a watch list. The main idea is that it periodically checks these pages and sends me an alert if the content changes. For notifications, it needs to support Discord, Slack, Telegram, and plain old email.

It's important that I can watch just a specific part of a page, like clicking on a product's price to only get alerts for that, ignoring ads or comments. It should also be able to handle logging into sites or clicking through cookie banners before checking the page.

Let's also add an AI feature that summarizes changes in simple English, like "Price dropped from $99 to $75," instead of showing me raw code. It should be a Python app that's easy to run with Docker. The goal is a powerful, private alternative to paid change monitoring services.