php-debugbar/frosting.json

{
    "services": {
        "debugBar": {
            "class": "DebugBar\\StandardDebugBar"
        },
        "debugBarRenderer": {
            "class": "DebugBar\\Renderer\\JavascriptRenderer",
            "configuration": {
                "baseUrl": "/frosting/asset/debugBar"
            }
        },
        "assetCopier": {
            "configuration": {
                "toMirror": {
                    "debugBar": {"source":"<?php echo str_replace('\\','/',__DIR__ . '/web') ?>"}
                }
            }
        }
    }
}