Plombir::Server::Handler
Inherits HTTP::Handler < Reference < Object
One HTTP::Handler serving files under a root directory:
/ and directory paths resolve to index.html inside them,
anything else must name an existing file, otherwise the
404.html page (or a plain fallback) is served with status 404.
With a LiveReload::Reloader, dev additionally serves the SSE
event stream and injects the reload snippet into .html pages.
Without one (preview), files go out byte-identical to disk.