Express app cannot find module OpenAIProvider

Hi! I'm trying to deploy a simple api with express. I have my entrypoint on /api/index.ts

// /api/index.ts
import app from '../src/app';
export default app;

The app for my api is on /src/app.ts

// src/app.ts
import express from 'express';
import cors from 'cors';
import { OpenAIProvider } from './providers/OpenAIProvider';
import chatRouter from './routes/chat';

const app = express();

// Middleware
app.use(cors());
app.use(express.json());
app.use(express.static('public'));

// Crear instancia del provider
const openAIProvider = new OpenAIProvider(process.env.OPENAI_API_KEY || '');

// Usar el router directamente ya que tiene su propia instancia del provider
app.use('/api/chat', chatRouter);

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});

export default app;

Also, I have a simple html file with some vanilla js to test the API on /public/index.html

After deploy, the index.html interface is accesible but when I try to use the api I have this error on log section.

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/var/task/src/providers/OpenAIProvider' imported from /var/task/src/app.js

My tsconfig.json

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "ES2020",
    "moduleResolution": "node",
    "outDir": "./dist",
    "strict": true,
    "esModuleInterop": true,
    "baseUrl": "."
  },
  "include": [
    "api/**/*",
    "src/**/*"
  ],
  "exclude": ["node_modules"]
}

My vercel.json

{
  "version": 2,
  "builds": [
    {
      "src": "src/app.ts",
      "use": "@vercel/node",
      "config": {
        "includeFiles": [
          "src/**/*",
          "tsconfig.json"
        ]
      }
    },
    {
      "src": "public/**",
      "use": "@vercel/static"
    }
  ],
  "routes": [
    {
      "src": "/api/(.*)",
      "dest": "src/app.ts"
    },
    {
      "src": "/(.*)",
      "dest": "public/$1"
    }
  ]
}

I will apreciate a lot any help from the comunity. thanks in advance!

If you're having trouble deploying an Express app, this guide can help.

https://vercel.com/guides/using-express-with-vercel

You can also ask v0 for suggestions tailored to your own project setup.

Hey, ! Did you manage to get a solution to this? Did you look at our express guide?