Browsers will by default try to request /favicon.ico from the root of a hostname, in order to show an icon in the browser tab.
If you want to avoid this request returning a 404, you can either:
- Supply a
favicon.icofile that is available at the root of your site. - Use a module such as serve-favicon to point requests to a specific file.
- Catch the
favicon.icorequest and send a204 No Contentstatus:
app.get('/favicon.ico', (req, res) => res.status(204));