include original http.Request in WebSocket struct.

handlers.go

@@ -45,6 +45,7 @@ func (rl *Relay) HandleWebsocket(w http.ResponseWriter, r *http.Request) {
 
 	ws := &WebSocket{
 		conn:      conn,
+		Request:   r,
 		Challenge: hex.EncodeToString(challenge),
 		Authed:    make(chan struct{}),
 	}

websocket.go

@@ -1,6 +1,7 @@
 package khatru
 
 import (
+	"net/http"
 	"sync"
 
 	"github.com/fasthttp/websocket"
@@ -10,6 +11,9 @@ type WebSocket struct {
 	conn  *websocket.Conn
 	mutex sync.Mutex
 
+	// original request
+	Request *http.Request
+
 	// nip42
 	Challenge       string
 	AuthedPublicKey string