Improve README.md and add REFERENCE.md (#12)

Author: Qard

README.md

@@ -1,4 +1,82 @@
-# python-node
+# @platformatic/python-node
 
-Work-in-progress implementation of a Python ASGI server running in Node.js
-via Rust.
+A high-performance Node.js native addon that enables running **ASGI-compatible Python applications** directly within Node.js environments. The Node.js host can communicate directly with the Python guest app without any network involved, allowing near-zero communcation overhead.
+
+This module provides a bridge between Node.js and Python, allowing you to:
+
+- **Run Python ASGI applications** (FastAPI, Starlette, Django ASGI, etc.) inside Node.js processes
+- **Handle HTTP requests** with ASGI 3.0 protocol support
+- **Process requests concurrently** using async Python code execution
+- **Integrate Python services** into existing Node.js applications seamlessly
+- **Support virtual environments** automatically for proper Python dependency isolation
+
+The module implements an ASGI server that translates between Node.js HTTP requests and Python ASGI applications, enabling you to leverage Python's rich ecosystem within Node.js applications.
+
+### Key Features
+
+- **ASGI 3.0 Support**: HTTP and Lifespan protocols (WebSocket support planned)
+- **Async/Sync Methods**: Both `handleRequest()` and `handleRequestSync()`
+- **Virtual Environment Detection**: Automatic Python environment discovery
+- **Cross-Platform**: Native binaries for macOS and Linux
+- **High Performance**: Rust-based implementation with minimal overhead
+
+### Requirements
+
+- **Node.js**: ≥ 20.0.0
+- **Python**: ≥ 3.8 with asyncio support
+- **System**: macOS (arm64, x64) or Linux (x64-gnu)
+
+The module automatically detects and uses Python virtual environments via the `VIRTUAL_ENV` environment variable.
+
+## Installation
+
+```bash
+npm install @platformatic/python-node
+```
+
+## API Reference
+
+For complete API documentation, see [REFERENCE.md](./REFERENCE.md).
+
+## Basic Usage
+
+```python
+# fastapi_app.py
+from fastapi import FastAPI
+from pydantic import BaseModel
+
+app = FastAPI()
+
+class Item(BaseModel):
+    name: str
+    price: float
+
+@app.post("/items/")
+async def create_item(item: Item):
+    return {"name": item.name, "price": item.price}
+```
+
+```javascript
+import { Python, Request } from '@platformatic/python-node'
+
+const python = new Python({
+  docroot: './python-apps',
+  appTarget: 'fastapi_app:app'
+})
+
+// POST with JSON body
+const response = await python.handleRequest(new Request({
+  method: 'POST',
+  url: '/items/',
+  headers: {
+    'Content-Type': 'application/json'
+  },
+  body: Buffer.from(JSON.stringify({
+    name: 'Widget',
+    price: 29.99
+  }))
+}))
+
+const result = JSON.parse(response.body.toString())
+console.log(result) // { name: 'Widget', price: 29.99 }
+```