Refactor file names
Rework/Restructure guides
Change notes to Admonitions
Review
Check all links

Missing Parts

Apache/nginx specific install e.g. .htaccess
Server Mailing / Setup (more infos)
Backup.md not in use? Perhaps Backup and Server move guide
Changelog in root dir + align path e.g. update.md
Rework Configuration Guide, either more sub configuration or statistics/tracing as own
Config -> Params advanced-configuration -> add all params