docusaurus: the blog experience

[dovholuknf]

right now the blogging experience is all based on hashnode. it would be better to be able to:

• author a blog using docusaurus' blog feature
• ~~use vercel to render PRs against the repo to solicit comments~~ https://github.com/openziti/ziti-doc/issues/185
• once merged to main have hashnode import from the markdown in the blog (assuming jsx/mdx doesn't interfere with this and assuming image imports work etc... that's a big 'tbd')
• if possible have hashnode federate/promote/crosspost to other static host sites