Merge remote-tracking branch 'origin/dev' into feature/own-learning-objects

# Conflicts:
#	backend/package.json
#	backend/src/config.ts
#	backend/src/controllers/learningObjects.ts
#	backend/src/controllers/learningPaths.ts
#	backend/src/data/content/attachment-repository.ts
#	backend/src/data/content/learning-object-repository.ts
#	backend/src/data/content/learning-path-repository.ts
#	backend/src/data/repositories.ts
#	backend/src/entities/content/learning-path.entity.ts
#	backend/src/exceptions.ts
#	backend/src/routes/learning-objects.ts
#	backend/src/services/learningObjects.ts
#	backend/src/services/learningPaths.ts
#	backend/src/util/apiHelper.ts
#	backend/src/util/envvars.ts
#	package-lock.json

backend/src/entities/classes/teacher-invitation.entity.ts

@@ -8,12 +8,21 @@ import {TeacherInvitationRepository} from "../../data/classes/teacher-invitation
  */
 @Entity({repository: () => TeacherInvitationRepository})
 export class TeacherInvitation {
-    @ManyToOne({ entity: () => Teacher, primary: true })
+    @ManyToOne({
+        entity: () => Teacher,
+        primary: true,
+    })
     sender!: Teacher;
 
-    @ManyToOne({ entity: () => Teacher, primary: true })
+    @ManyToOne({
+        entity: () => Teacher,
+        primary: true,
+    })
     receiver!: Teacher;
 
-    @ManyToOne({ entity: () => Class, primary: true })
+    @ManyToOne({
+        entity: () => Class,
+        primary: true,
+    })
     class!: Class;
 }