Function file 

async fn file(__arg0: Path<String>, headers: HeaderMap) -> Response

One of the three assets, or nothing.

There is no SPA fallback here and there must not be one: every view in the app lives under the hash (/#/logs), so a path this table does not know is not a UI route that needs rescuing — it is a request for something that does not exist. Answering it with 200 and index.html made /health, /metrics and every probe path an operator might try report success in HTML, which is the one answer worse than a 404.