[HOTFIX] make media public folder configurate able

__Tasks:__

- [ ] test coverage
- [ ] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Tests pass?   | none
| Fixed tickets | #618 
| BC Breaks     | none
| Doc           | none
And write `dev-develop` as version, not sure if I make it today.