Nginx with HTTP/2 support (and behind HAProxy with HTTP/2)

vhost.conf

server {
  listen      80  default_server;
  listen      81  default_server http2 proxy_protocol; ## Needed when behind HAProxy with SSL termination + HTTP/2 support
  listen      443 default_server ssl http2;

  ssl_certificate       /etc/ssl/dummy.crt;
  ssl_certificate_key   /etc/ssl/dummy.key;

  root        /data/www/default;
  index       index.html;
}