How to use the midway-core.ContainerLoader function in midway-core

protected loadApplicationContext(): void {
    // this.app.options.container 测试用例编写方便点
    const containerConfig = this.config.container || this.app.options.container || {};
    if (!containerConfig.loadDir) {
      // 如果没有配置，默认就把扫描目录改到 /src or /dist
      containerConfig.baseDir = this.baseDir;
    }
    // 在 super constructor 中会调用到getAppInfo，之后会被赋值
    // 如果是typescript会加上 dist 或者 src 目录
    this.containerLoader = new ContainerLoader({
      baseDir: this.appDir,
      isTsMode: this.isTsMode
    });
    this.containerLoader.initialize();
    this.applicationContext.registerObject('appDir', this.appDir);
    // 如果没有关闭autoLoad 则进行load
    this.containerLoader.loadDirectory(containerConfig);

    // register handler for container
    this.containerLoader.registerHook(MidwayHandlerKey.CONFIG, (key: string) => {
      return safelyGet(key, this.config);
    });

    this.containerLoader.registerHook(MidwayHandlerKey.PLUGIN, (key: string) => {
      return this.app[key] || this.pluginContext.get(key);
    });

constructor(
    options: {
      baseDir?: string;
      config?: object;
      typescript?: boolean;
      preloadModules?: any[];
      logger?: any;
    } = {}
  ) {
    this.appDir = options.baseDir || process.cwd();
    this.globalConfig = options.config || {};
    this.logger = options.logger || console;
    this.isTsMode = this.getTsMode(options.typescript);
    this.baseDir = this.getBaseDir();

    this.loader = new ContainerLoader({
      baseDir: this.baseDir,
      isTsMode: this.isTsMode,
      preloadModules: options.preloadModules || [],
    });
    this.loader.initialize();
  }