Ubuntu 22.04 Install Script #35

- Added better intro text when running script. - Added check to ensure it's ran with root/sudo privileges. - Updated command to get the current IP due to aliases messing up old command. - Updated domain entry text to also mention IP. - Updated installed packages to use 22.04 ubuntu packages. - Enhanced bookstack folder/file permission defaults to use the current script-running user as the primary owner. Also applied stronger .env permissions and ignored permissions in git changes. - Added addition comments to script - Added checks for existing apache/mysql usage before run. - Segmented script into functions and added custom output handling to capture core output into log file while showing simpler, pretty messages to the user. - Changed final output into a cleaner table. Added to site in https://github.com/BookStackApp/website/pull/118