crawler

As noticed in #4492, the FAq question at https://docs.scrapy.org/en/latest/faq.html#scrapy-crashes-with-importerror-no-module-named-win32api is no longer useful as the Twisted bug was fixed long time ago. We should remove this question.

Bug 描述
访问前端页面时，会有两个请求404

复现步骤
该 Bug 复现步骤如下

1. 使用官方文档中的ym启动docker-compose
2. 访问前端页面
3. 弹出请求失败404

期望结果
xxx 能工作。

截屏

Description

There are plenty of TODOs in codes, settings and documentations, start with these will be a good choice.
Different tasks will bind with different issue, please submit your PR and refer to the corresponding issue, will open in days.
NOTICE: This is a good first issue, new contributors are welcome!

Unless I missed something, the documentation doesn't explain how to query document metadata (searching "site:montferret.dev metadata" through Google returned nothing, neither did grepping the source code).

As an example, I tried to query the og:url metadata.
I tried variations of //meta[property='og:url']::attr(content), with or without the leading //, and with or without the `attr(conte