是否有简单的方法可以将 Discourse 实例临时设置为只读模式，而无需更改所有分类？
我们希望让版主团队度过圣诞节和新年假期，因此我们正在寻找一种方法，将实例设置为只读模式，而无需更改每个分类的权限。这样，用户仍然可以阅读文档，但无法创建新主题或发布新回复。在此期间无需版主介入，因为很可能也不会有人标记帖子。
by the way, we just tested it and found a bug when it is in read-only mode.
You can start to create a post or topic but you are not able to save it then, where the message is shown that the site is in read-only mode, which is fine.
But you are also not able to cancel it. 
So the message remains and when the site is switched back online, then you are able to cancel the post.
Would be great if it is possible to cancel the message also in the read-only mode.