As noted in the title, all the links in the README pointing to https://engineering.hexacta.com are no longer working as that host does not resolve anymore.
Do you still have those blog posts saved to enable you to repost them on your new blog?
Or maybe update the URLs to appropriate Wayback Machine URLs instead if that's the only possible thing?
Given the above, I have a similar suggestion for having all code samples in the repo as self-contained examples per post, so that they can be run locally rather than only hosted on external services, as they may go away eventually without notice. This is not to suggest removing links to easy-to-run examples on external hosts, but just in addition to, rather than instead of.