docker/l3d#74 Move all documentation to devops-tools doc

README.md

-When updating PHP version at a later stage, there are extra steps that need to be taken:
+# JailKit
 
-- Update `/etc/jailkit/jk_init.ini`
-- Force updating all Jails: `jk_init --force -j /jails/[NAME]/ php`
-- Manually update `/jails/[NAME]/etc/alternatives/php`
+You find all the details in the [full documentation](https://devops-tools.docs.lakedrops.com/ansible/roles/jailkit/).