add readme

README.md

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+# Jellydisc
+Jellydisc updates Discord Rich Presence by checking what you're currently listening to on Jellyfin!
+
+## Requirements
+- A Jellyfin server (self-hosted or hosted)
+- A Discord account
+- Python 3.9 or higher
+
+## Installation
+1. Clone this repository
+2. Install the required dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+3. Configure the `.env`, using the provided `.env.example` as a template.
+4. Run the application:
+   ```bash
+   python main.py
+   ```