vercel.json

{
  "buildCommand": "flutter/bin/flutter build web --release",
  "installCommand": "if cd flutter; then git pull && cd .. ; else git clone https://github.com/flutter/flutter.git; fi && ls && flutter/bin/flutter doctor && flutter/bin/flutter clean && flutter/bin/flutter config --enable-web",
  "outputDirectory": "build/web",
  "devCommand": "deno run --allow-net --allow-read --allow-env devproxy.js",
  "headers": [
    {
      "source": "/api/(.*)",
      "headers": [
        { "key": "Access-Control-Allow-Origin", "value": "*" }
      ]
    }
  ]
}