v0.155-rollback

v0.155

All current files can be extracted into (or into a subdir) below webroot. In the next version (v0.156) the filestructure will change: all current files will be moved into a folder public_html. A folder for docs and a local docker dev environment will be added.

On installations using git the internal updater or a git pull will apply that change and will make the installation unusable in the first moment. I will add a documentation what files need to be moved.

This tag is a helper for a fast rollback that gives you some more time to prepare a new try of the update.