How to use the @vendure/core.bootstrap function in @vendure/core

}
    if (!index.config) {
        console.error(`The file "${configFile}" does not export a "config" object`);
        process.exit(1);
        return;
    }

    const config = index.config;

    // Force the sync mode on, so that all the tables are created
    // on this initial run.
    config.dbConnectionOptions.synchronize = true;

    const { bootstrap } = require('@vendure/core');
    console.log('Bootstrapping Vendure server...');
    const app = await bootstrap(config);
    return app;
}

import { bootstrap } from '@vendure/core';

import { devConfig } from './dev-config';

/**
 * This bootstraps the dev server, used for testing Vendure during development.
 */
bootstrap(devConfig).catch(err => {
    // tslint:disable-next-line
    console.log(err);
});

                () => bootstrap(populateConfig),
                initialData,