`try_files {path} {path}/index.html /index.html` for SPA sites and the
dashboard: a URL like /docs/setup/ serves that directory's own index.html
before falling back to the root one, so a multi-page static site works at its
sub-paths while single-page apps still get client-side routing.
Found uncommitted in the checkout, author unknown, and already live: wildpc
runs from this tree, so every Caddyfile generated since used it.
Paul Payne
c6c361e38a