Or even simpler, just make your application listen to a particular port and implement a full HTTP server, and reverse proxy to that (or not) using whatever tech

Or even simpler, just make your application listen to a particular port and implement a full HTTP server, and reverse proxy to that (or not) using whatever tech you fancy (Apache, nginx, Cloudflare, Cloudfront, ELB...) This achieves the same thing while providing more control and layering standard protocols.