docs: update readme

README.md

@@ -1,22 +1,63 @@
 # markdown2png
 
-A simple TypeScript tool that converts Markdown files to PNG images using Puppeteer.
+A web-based tool built with Next.js that converts Markdown files to PNG images with GitHub-style formatting.
+
+## Features
+
+- Browser-based Markdown to PNG conversion
+- GitHub-style syntax highlighting
+- Live preview
+- High-quality PNG output
+
+## Tech Stack
+
+- Next.js 13.5
+- React 18
+- TypeScript
+- TailwindCSS
+- marked (for Markdown parsing)
+- highlight.js (for syntax highlighting)
+- html-to-image (for PNG conversion)
 
 ## Requirements
 
-- Node
+- Node.js
 - yarn
 
 ## Installation
 
+1. Clone the repository:
+```bash
+git clone https://github.com/riccardosenica/markdown2png.git
+cd markdown2png
+```
+
+2. Install dependencies:
 ```bash
 yarn
 ```
 
-## Commands
+## Development
+
+To run the development server:
 
 ```bash
-yarn dev PATH_TO_FILE.md
+yarn dev
 ```
 
-The output PNG file is in the `output` folder.
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+## Available Scripts
+
+- `yarn dev` - Runs the development server
+- `yarn build` - Creates a production build
+- `yarn start` - Runs the production server
+- `yarn lint` - Runs ESLint
+- `yarn format` - Formats code with Prettier
+- `yarn typecheck` - Runs TypeScript type checking
+
+## Usage
+
+1. Upload your Markdown (.md) file using the file input
+2. Preview your formatted Markdown with syntax highlighting
+3. Click "Convert to PNG" to download your image