updated readme

Author: SolidProgramming

README.md

@@ -1,2 +1,20 @@
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+# AniWorldReminder_API
+
+`AniWorldReminder_API` is the backend/API part of the AniWorldReminder project.
+
+It acts as the counterpart to the UI project `AniWorldReminder_Webpanel`:
+https://github.com/SolidProgramming/AniWorldReminder_Webpanel
+
+This project is built with ASP.NET Core and provides the server-side functionality for features such as:
+
+- user authentication
+- Telegram-based verification and notifications
+- series reminder management
+- watchlists
+- download queue handling
+- integration with AniWorld and STO data sources
+
+In short, this repository contains the API, background jobs, and service integrations that power the web panel.