Create main config file in root directory

- Moved main config file to root directory as 'config'
- This is the correct location for live-build to recognize it
- Should finally resolve the 'config stage required' error
- All settings consolidated in the main config file

config/preseed/debian-installer.cfg

@@ -4,7 +4,7 @@ d-i keyboard-configuration/xkb-keymap select us
 d-i netcfg/choose_interface select auto
 d-i netcfg/get_hostname string debian
 d-i netcfg/get_domain string local
-d-i passwd/root-password-crypted password $1$ZzlHf5PP$Pi787cqZSHJpF48zXJ2MH0
+d-i passwd/root-password-crypted password $1$dYGA5OyR$hFjhEioC5utSn51bXJVTu/
 d-i passwd/user-fullname string
 d-i passwd/username string
 d-i passwd/user-password password