fes.js/packages/fes-build-webpack/src/plugins/features/devServer.js

export default (api) => {
    api.describe({
        key: 'devServer',
        config: {
            default: {},
            schema(joi) {
                return joi
                    .object({
                        port: joi.number().description('devServer port, default 8000'),
                        host: joi.string(),
                        https: joi.alternatives(
                            joi
                                .object({
                                    key: joi.string(),
                                    cert: joi.string(),
                                })
                                .unknown(),
                            joi.boolean(),
                        ),
                        headers: joi.object(),
                        writeToDisk: joi.alternatives(joi.boolean(), joi.function()),
                    })
                    .description('devServer configs')
                    .unknown(true);
            },
        },
    });
};