getSiteData () {
    const { locales } = this.siteConfig
    if (locales) {
      Object.keys(locales).forEach(path => {
        locales[path].path = path
      })
    }

    return {
      title: this.siteConfig.title || '',
      description: this.siteConfig.description || '',
      base: this.base,
      headTags: this.siteConfig.head || [],
      pages: this.pages.map(page => page.toJson()),
      themeConfig: this.siteConfig.themeConfig || {},
      locales
    }
  }
Get the data to be delivered to the client.

@returns {{
 title: string,
 description: string,
 base: string,
 pages: Page[],
 themeConfig: ThemeConfig,
 locales: Locales
}}
@api public