Docker image variants and improvements

At the moment there is • from master branch (deprecated) • from debian branch (Current official) • (Alternative) Issues • This is somewhat confusing for users • Many users still use the deprecated master branch • This causes a lot of overhead in terms of support • There is no automatic release of new images and maintaining the variants on different branches causes an overhead with reduntant commits and tagging • A lot of systems e.g. Unraid still use the master branch • There is no official guide how to move from one (deprecated) image to another one? (Maybe is sufficient, if email is properly configured?) Idea • Make a single official image, based on Laravel Octane / FrankenPHP - FrankenPHP is now officially maintaine by php foundation - It allows to have a self-contained image • Instead of maintaining different image variants, it would be better to provide releases/guides for - Synology -…