fix build script for frontend
fix build script for frontend

EduCaMa/Showcase,tobiasschaefer/Showcase,educama-students/Showcase,tobiasschaefer/Showcase,thorstenjakoby/Showcase,maximilianbehrendt/Showcase,maximilianbehrendt/Showcase,Valon1551/Showcase,tobiasschaefer/Showcase,thorstenjakoby/Showcase,EduCaMa/Showcase,kraussj/Showcase,thorstenjakoby/Showcase,tobiasschaefer/Showcase,Valon1551/Showcase,maximilianbehrendt/Showcase,eberhardheber/Showcase,educama-students2/Showcase,educama-students2/Showcase,kraussj/Showcase,eberhardheber/Showcase,educama-students/Showcase,maximilianbehrendt/Showcase,kraussj/Showcase,eberhardheber/Showcase,EduCaMa/Showcase,kraussj/Showcase,thorstenjakoby/Showcase,EduCaMa/Showcase,educama-students2/Showcase,educama-students2/Showcase,tobiasschaefer/Showcase,EduCaMa/Showcase,eberhardheber/Showcase,educama-students/Showcase,Valon1551/Showcase,educama-students/Showcase,educama-students2/Showcase,maximilianbehrendt/Showcase,eberhardheber/Showcase,kraussj/Showcase,educama-students/Showcase,thorstenjakoby/Showcase,Valon1551/Showcase,Valon1551/Showcase