This PR continues the cleanup work done in #2316 by removing the need for additional files to be generated or copied to render either a preview or production docs site. The /docs/ directory is a ready-to-be-served production site, and the local and Vercel server configurations are used to virtualize the necessary changes based on the files in /docs/.

FWIW, I would have done this in #2316, but I was unaware of Vercel's middleware capabilities.

If this PR is accepted, PRs #2317 and #2322 can be closed.

Summary

Update Vercel preview to be served from virtual /preview directory instead of /preview.html file.
Update local dev server configuration to serve /docs/index.html with URL rewrites
Update local prod server configuration to serve /docs/ directory without modification
Remove build:html script and resulting preview.html file
Fix CSS watch functionality

Related issue, if any:

2218

close #2317 close #2322

What kind of change does this PR introduce?

Bugfix Build-related changes

For any code change,

Does this PR introduce a breaking change?

Tested in the following browsers:

[x] Chrome
[x] Firefox
[x] Safari
[x] Edge

docsifyjs / docsify

chore: Update local and Vercel preview. Fix CSS watch functionality. #2348