rsshub base_url的支持

[hujh818]

Clear and concise description of the problem

目前所有订阅的rsshub都指向官网，这样一方面导致官方实力的负载较高，另一方面导致有一些rss的可用性较差

Suggested solution

希望有一个选项可以自动把所有基于rsshub的订阅网址替换成自己部署的网址

Alternative

No response

Additional context

No response

Validations

• [X] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[linear[bot]]

FOL-342 rsshub base_url的支持

[i-iooi-i]

确实非常需要这个，刚才试用了一下，发现不支持自部署的rsshub~

[github-actions[bot]]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

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I really need this. I tried it just now and found that rsshub does not support self-deployment~

[github-actions[bot]]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

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I really need this. I tried it just now and found that rsshub does not support self-deployment~

[DIYgod]

Duplicate of #363