Domain-model.md

 Domain model  
-![Domain_Model](uploads/6c703001b5769c1f11cd82ba82583355/Domain_Model.png)
+![DomainModel](uploads/d01b5e16144ffa2fd684c7d2dff066c2/DomainModel.png)
 [Requirements](https://gitlab.stud.idi.ntnu.no/gruppe-12/picturerama/-/wikis/Requirements)
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