* Rework Readme file
* Fixed db-folder paths
* Typos
* Fixed Typos
* Fix typo
* Use pull to correctly pull a newer base image
* Moved heading to the top
* Clarify serving of static files in the fpm container
* Update Persistant data
* Added theming.
* Added information on apps and custom_apps folder.
* Typos, clarification
* Added migration part
* Fix wrong use of --pull
* Reordering, spelling, clarification
* Specified volumes section
* Corrected examples
* Added /var/www/html to the fine grained volume approach
Also added a line on upgrading.
* Typos in migration section
* Updated SSL-encryption, Typos, removed "..."
* Typos and some layout improvements
* Typo, typo, typo :D
* Added hint to set passwords
* added links for external containers in ssl example
