As you can see below, it is very much a real door with hinges and a door handle:
The door is held upright with four large, metal shelf hinges, and part of a broken bookshelf serves as a table:
Various details:
Home » Orthodoxy » Our Iconostasion: A Doorway to Heaven
Ἀρχὴ σοφίας φόβος Κυρίου.