1) can load 20+ docker containers on one host with one static IP
2) reverse-proxy compatibility (remote host)
3) local db
4) possibility easily and quickly do dump of db+mysql+docker
7) separate db for each site
8) custom php-fpm configuration (separate files? )
9) github save (exclude password from configuration files to ENV)
Main idea - do HA containers to isolate each site and with problems with one site with totaled hacked, stay other sites online.