Improving download infrastructure Phase 2

Further improve reliability and performance.

• move forum fastCGI to separate nginx opted to remove perl module and tune php-fpm instead

• flatten apt and redirect codebase

• move container running management to systemd units

• add geo-ip support

• add mirror healthchecks

• add redirect support for archive.armbian.com

• create mindmap or some other way of infrastructure documentation – Netbox