Add README.md with installation, usage, and development workflow instructions for ViteDevProxy

Author: swedishkid

README.md

@@ -0,0 +1,65 @@
+# ViteDevProxy
+
+A .NET library that provides easy integration of Vite development server proxying in ASP.NET Core applications using YARP (Yet Another Reverse Proxy).
+
+## Installation
+
+```bash
+dotnet add package ViteDevProxy
+```
+
+## Usage
+
+### Basic Setup
+
+Add ViteDevProxy to your ASP.NET Core application:
+
+```csharp
+using ViteDevProxy;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add ViteDevProxy services (defaults to http://localhost:5173/)
+builder.Services.AddViteDevProxy();
+
+var app = builder.Build();
+
+// Map the reverse proxy
+app.MapViteDevProxy();
+
+app.Run();
+```
+
+### Custom Vite Dev Server URL
+
+```csharp
+// Configure custom Vite dev server URL
+builder.Services.AddViteDevProxy("http://localhost:3000/");
+```
+
+## What it does
+
+ViteDevProxy automatically configures YARP to:
+- Proxy all requests (`{**catch-all}`) to your Vite development server
+- Handle WebSocket connections for Hot Module Replacement (HMR)
+- Maintain proper headers and request context
+
+## Development Workflow
+
+1. Start your Vite development server:
+   ```bash
+   npm run dev
+   ```
+
+2. Start your ASP.NET Core application with ViteDevProxy configured
+
+3. Access your application through the ASP.NET Core server - all frontend requests will be automatically proxied to Vite
+
+## Requirements
+
+- .NET 9.0
+- Vite development server running (typically on port 5173)
+
+## License
+
+MIT