Since, SPA handles 404 pages in the client side, it needs a mechanism to handle HTTP status code through HTML

For example, https://github.com/GoogleChrome/rendertron#status-codes provides below syntax to pass HTTP status code from HTML:

<meta name="render:status_code" content="??" />

FWIW, tagging active fork authors in case if they have better solution implemented in their fork. @PureLandFlying @plan-my-binge @muhammadmuhlas @mehdipourfar