feat(core): Add backendProtocol option to support HTTP/2 client sessions alongside HTTP/1. This update enhances NetworkProxy's core functionality by integrating HTTP/2 support in server creation and request handling, while updating plugin exports and documentation accordingly.

readme.md

@@ -197,7 +197,27 @@ sequenceDiagram
 - **HTTP to HTTPS Redirection** - Automatically redirect HTTP requests to HTTPS
 - **Let's Encrypt Integration** - Automatic certificate management using ACME protocol
 - **IP Filtering** - Control access with IP allow/block lists using glob patterns
-- **NfTables Integration** - Direct manipulation of nftables for advanced low-level port forwarding
+ - **NfTables Integration** - Direct manipulation of nftables for advanced low-level port forwarding
+
+## Configuration Options
+
+### backendProtocol
+
+Type: 'http1' | 'http2' (default: 'http1')
+
+Controls the protocol used when proxying requests to backend services. By default, the proxy uses HTTP/1.x (`http.request`). Setting `backendProtocol: 'http2'` establishes HTTP/2 client sessions (`http2.connect`) to your backends for full end-to-end HTTP/2 support (assuming your backend servers support HTTP/2).
+
+Example:
+```js
+import { NetworkProxy } from '@push.rocks/smartproxy';
+
+const proxy = new NetworkProxy({
+  port: 8443,
+  backendProtocol: 'http2',
+  // other options...
+});
+proxy.start();
+```
 - **Basic Authentication** - Support for basic auth on proxied routes
 - **Connection Management** - Intelligent connection tracking and cleanup with configurable timeouts
 - **Browser Compatibility** - Optimized for modern browsers with fixes for common TLS handshake issues