Testing out Slim 4 Framework

[tertek]

This task is for testing out Slim 4 Framework and getting some first hands on experience.

• [x] Setup Slim 4 Skeleton on WSL and run with development server composer start
• [x] Add routes to test out API behaviour
• [x] Add pdftk-php as a service to the framework
• [ ] Add actions that consume pdftk-php service to reflect pdf-api core actions, such as scan pdf, fill pdf, etc.
• [ ] Add database connection
• [ ] Implement a limited scope of the Entitity Relationship diagram, for example Projects and Mailjobs
• [ ] Add authentication to restricted endpoints

[tertek]

@edenst-TPH Ich denke dies hier können wir verwerfen, da du nun am eigentlichen Projekt mit Slim erfolgreich arbeitest.