vercel.json

{
  "version": 2,                                                                                                                                                                                                                                                                              
  "builds": [
    {
      "src": "backend/app.py",
      "use": "@vercel/python"
    },                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
    {
      "src": "package.json",
      "use": "@vercel/static-build",
      "config": {
        "distDir": "build"
      }
    }
  ],
  "routes": [
    {
      "src": "/backend/(.*)",
      "dest": "/backend/app.py"
    },
    {
      "src": "/(.*)",
      "dest": "/$1"
    }
  ]
}