apache, php fpm, http2, basic setup

good tutorial on basic LAMP with http2 setup

https://http2.pro/doc/Apache

this fixes problem:

The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.