You can’t really make the camera 2D.
You can try to trick it by having it a long way away and reducing the FieldOfView so just this section is displayed.
Another thing you can try is to just put Decals on the front face of all the bins at the bottom and on the cylinders, and make the bins and cylinders Transparent so you don’t see them, just the Decals.
Make ALL the parts Transparent and put white Decals on all the cylinders (posts) and coloured Decals on the front faces of the bins at the bottom of the screen.
This way only the 2D decals will show up. You won’t see the angled sides of these items.