Change DeepSeek V3 0324 to DeepSeek R1

DeepSeek R1 can think before responding, that is great at code compared by DeepSeek V3 0324 (Or DeepSeek V3.1).

server.js

@@ -30,7 +30,7 @@ const __dirname = path.dirname(__filename);
 const PORT = process.env.APP_PORT || 3000;
 const REDIRECT_URI =
   process.env.REDIRECT_URI || `http://localhost:${PORT}/auth/login`;
-const MODEL_ID = "deepseek-ai/DeepSeek-V3-0324";
+const MODEL_ID = "deepseek-ai/DeepSeek-R1";
 const MAX_REQUESTS_PER_IP = 2;
 
 app.use(cookieParser());