You can use kiwix (https://www.kiwix.org/en/).

It is an open-source software that allows you to keep and read offline static versions of websites in a specialized archive format (zim-files)

It was originally designed to allow you to read wikipedia offline, but there are also dumps of stackoverflow available on the relevant page : https://wiki.kiwix.org/wiki/Content_in_all_languages

Here, just pin the underlying IPFS object, or use this one hosted by cloudflare: https://ipfs-sec.stackexchange.cloudflare-ipfs.com/

https://kapeli.com/dash also has the ability to download offline archives of SO. Its interface is very good.

You can download the database dump from https://archive.org/details/stackexchange.

no they don't, but if yours does you can download a complete datadump of SO from them.