update server (#3)

- update server (3e8fd7c5d85bd292cdaacbbce5be6a1518e51608)

server/server.js

@@ -306,7 +306,7 @@ server.on('upgrade', (request, socket, head) => {
             geminiWs.on('close', (code, reason) => {
                 console.log(`Gemini WebSocket closed: ${code} ${reason.toString()}`);
                 if (clientWs.readyState === WebSocket.OPEN || clientWs.readyState === WebSocket.CONNECTING) {
-                    clientWs.close(code, reason.toString());
+                    clientWs.close(code, reason.toString('utf8'));
                 }
             });