use different endpoint structure

src/app/api/chat/route.js

@@ -1,23 +1,19 @@
 import { HuggingFaceInference } from "@langchain/community/llms/hf";
 
-export default async function handler(req, res) {
-  if (req.method === 'POST') {
-    try {
-      const { query } = req.body;
+export async function POST(req, res) {
+  try {
+    const { query } = req.body;
 
-      const model = new HuggingFaceInference({
-        model: 'm42-health/Llama3-Med42-8B',
-        apiKey: process.env.HUGGING_FACE_API_KEY,
-      });
+    const model = new HuggingFaceInference({
+      model: 'm42-health/Llama3-Med42-8B',
+      apiKey: process.env.HUGGING_FACE_API_KEY,
+    });
 
-      const response = await model.invoke(query);
+    const response = await model.invoke(query);
 
-      res.status(200).json({ answer: response });
-    } catch (error) {
-      console.error(error);
-      res.status(500).json({ error: 'Error generating response' });
-    }
-  } else {
-    res.status(405).json({ error: 'Method Not Allowed' });
+    res.status(200).json({ answer: response });
+  } catch (error) {
+    console.error(error);
+    res.status(500).json({ error: 'Error generating response' });
   }
 }