sp-dev-fx-webparts/samples/react-search-refiners/config/serve.json

{
    "$schema": "https://developer.microsoft.com/json-schemas/core-build/serve.schema.json",
    "port": 4321,
    "https": true,
    "initialPage": "https://localhost:5432/workbench",
    "api": {
        "port": 5432,
        "entryPath": "node_modules/@microsoft/sp-webpart-workbench/lib/api/"
    },
    "serveConfigurations": {
        "default": {
            "pageUrl": "https://localhost:5432/workbench"
        },
        "queryStringDataSource": {
            "pageUrl": "https://collaborationcorner.sharepoint.com/teams/PnPIntranet/_layouts/15/workbench.aspx",
            "customActions": {
                "24cae67d-dec7-4eff-bb41-49451d5b5a11": {
                    "location": "ClientSideExtension.ApplicationCustomizer",
                    "properties": {}
                }
            }
        }
    }
}