Update README.md

README.md

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-# TasmotaTimer
+# Tasmota Timer
+
+This application provides an easy-to-use interface for setting and controlling timers on Tasmota-powered smart plugs. Users can manage the timer on their Tasmota devices through a web interface accessible from various devices, including mobile phones and PCs.
+
+### System Overview
+
+The system is composed of two main components:
+
+1. **Front-End**: The application interface that interacts directly with the end-user.
+2. **Back-End**: The Node.js backend that communicates with both the app and the Tasmota devices.
+
+### Key Features
+
+- **User-Friendly Interface**: Simple and intuitive web interface for controlling the timer on smart plugs.
+- **Cross-Device Access**: Accessible via mobile phones, PCs, and other devices.
+- **Secure Authentication**: Decoupled user and device authentication for enhanced security.
+- **Subnet Support**: Operates across different subnets to improve security.
+- **Logging**: Extensive logging capabilities for monitoring and troubleshooting.
+
+### Deployment
+
+The Node.js backend can be hosted on an always-on device, such as a NAS (e.g., Synology), ensuring constant availability and reliability.