Added working code

.gitignore

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+.env
+node_modules/

package.json

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+{
+  "name": "invoice-api",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@mistralai/mistralai": "^1.5.2",
+    "cors": "^2.8.5",
+    "dotenv": "^16.5.0",
+    "express": "^5.1.0",
+    "multer": "^1.4.5-lts.2",
+    "node-fetch": "^3.3.2"
+  }
+}

server.js

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+import express from "express";
+import multer from "multer";
+import dotenv from "dotenv";
+import cors from "cors";
+import fetch from "node-fetch";
+
+dotenv.config();
+
+const app = express();
+const port = process.env.PORT || 5000;
+const upload = multer({ storage: multer.memoryStorage() });
+
+app.use(express.json());
+app.use(cors());
+
+app.get("/", (req, res) => {
+  res.send("Hello World!");
+});
+
+app.post("/extract", upload.single("file"), async (req, res) => {
+  if (!req.file) {
+    return res.status(400).json({ error: "No file uploaded" });
+  }
+
+  try {
+    const base64Image = req.file.buffer.toString("base64"); // Convert image to Base64
+
+    const requestBody = {
+      model: "pixtral-12b",
+      messages: [
+        {
+          role: "user",
+          content: [
+            { type: "text", text: "Extract invoice details from this image. Now for extracting the details, I want JSON of this invoice. The main reason behind this is that invoices do not have a fixed format, but with JSON it will be in a fixed format. So please output as JSON only, nothing else, just JSON." },
+            { type: "image_url", image_url: `data:image/jpeg;base64,${base64Image}` }
+          ],
+        },
+      ],
+    };
+
+    const controller = new AbortController();
+    const timeoutId = setTimeout(() => controller.abort(), 30000); // 30 seconds timeout
+
+    const response = await fetch("https://api.mistral.ai/v1/chat/completions", {
+      method: "POST",
+      headers: {
+        "Authorization": `Bearer ${process.env.MISTRAL_API_KEY}`,
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify(requestBody),
+      signal: controller.signal,
+    });
+
+    clearTimeout(timeoutId);
+
+    console.log("Mistral API Response Status:", response.status);
+
+    if (!response.ok) {
+      const errorResponse = await response.text();
+      console.error("Error Response:", errorResponse);
+      return res.status(response.status).json({ error: errorResponse });
+    }
+
+    const data = await response.json();
+    console.log("Mistral API Response:", JSON.stringify(data, null, 2));
+
+    const jsonContent = data.choices[0].message.content;
+    const cleanedJsonContent = jsonContent.replace(/```json\n|\n```/g, '');
+
+    let invoiceData;
+    try {
+      invoiceData = JSON.parse(cleanedJsonContent);
+    } catch (parseError) {
+      console.error("Error parsing JSON:", parseError);
+      return res.status(500).json({ error: "Error parsing JSON response" });
+    }
+
+    res.json(invoiceData);
+  } catch (error) {
+    if (error.name === 'AbortError') {
+      console.error("Request timed out");
+      return res.status(504).json({ error: "Request timed out" });
+    }
+    console.error("Error:", error.message);
+    res.status(500).json({ error: error.message });
+  }
+});
+
+app.listen(port, "0.0.0.0", () => {
+  console.log(`Server running on port ${port}`);
+});