unleash.unleash/frontend/vercel.json

{
  "rewrites": [
    { "source": "/api/:match*", "destination": "https://unleash.herokuapp.com/api/:match*" },
    { "source": "/logout", "destination": "https://unleash.herokuapp.com/logout" },
    { "source": "/auth", "destination": "https://unleash.herokuapp.com/auth" }
  ]
}