from https://gist.github.com/GAS85/990b46a3a9c2a16c0ece4e48ebce7300 from https://techwombat.com/enable-http2-apache-ubuntu-16-04/
- A self-managed VPS or dedicated server with Ubuntu 16.04 running Apache 2.4.xx.
- A registered domain name with working HTTPS (TLS/SSL). HTTP/2 only works alongside HTTPS because most browsers, including Firefox and Chrome, don’t support HTTP/2 in cleartext (non-TLS) mode.