backend/app/views/favicons.ejs
<link rel="icon" sizes="16x16" href="/images/favicon-16x16.png">
<link rel="icon" sizes="32x32" href="/images/favicon-32x32.png">
<link rel="icon" sizes="48x48" href="/images/favicon.ico">
<link rel="apple-touch-icon" href="/images/apple-touch-icon.png">
<link rel="manifest" href="/matrix.webmanifest">