now.json

{
    "version": 2,
    "github": {
        "silent": true
    },
    "builds": [
        {
            "src": "sub-web/**",
            "use": "@now/static"
        },
        {
            "src": "subconverter/subconverter.exe",
            "use": "now-static-bin",
            "config": {
                "port": 25500,
                "timeout": 1500,
                "includeFiles": [
                    "subconverter/**"
                ]
            }
        }
    ],
    "routes": [
        {
            "src": "/(js|css|fonts)/(.*)",
            "headers": {
                "cache-control": "max-age=31536000, immutable"
            },
            "dest": "sub-web/$1/$2"
        },
        {
            "handle": "filesystem"
        },
        {
            "src": "/",
            "dest": "sub-web/index.html"
        },
        {
            "src": "/favicon\\.ico",
            "dest": "sub-web/favicon.ico"
        },
        {
            "src": "/(.*)",
            "dest": "subconverter/subconverter.exe"
        }
    ]
}