Update server.js

server.js

@@ -18,18 +18,24 @@ app.all('/', async (req, res) => {
 });
 
 app.post('/chat', async (req, res) => {
-  const { sessionId, message } = req.body;
+  const { sessionId, message, temperature = 0.6, system = '' } = req.body;
   if (!sessionId || !message) return res.status(400).json({ error: 'Missing sessionId or message' });
 
   const sessionFile = path.join(os.tmpdir(), sessionId);
   let history = fs.existsSync(sessionFile) ? JSON.parse(fs.readFileSync(sessionFile, 'utf8')) : [];
-
+  
   history.push({ role: 'user', content: message });
 
   const chatCompletion = await groq.chat.completions.create({
-    messages: history,
+    messages: system ? [
+      {
+        role: 'system', 
+        content: system
+      },
+      ...history
+    ] : history,
     model: 'deepseek-r1-distill-qwen-32b',
-    temperature: 0.6,
+    temperature,
     max_completion_tokens: 4096,
     top_p: 0.95,
     stream: true