pub fn get_spa_fallback() -> Option<String>Expand description
The configured SPA-fallback file (e.g. "index.html"), or None if
RWS_CONFIG_SPA_FALLBACK is unset/empty (the default — disabled). Read
fresh on every call, so it can be toggled via rws.config.toml + SIGHUP
without a restart, the same as get_max_body_size.