Derech HaMelech–
?
mghanooni–
You can place the hinge(s) on the bottom, left or right of the door, depending on whether you want it to swing down, to the left or to the right.
You can use a couple of small hinges or one long hinge (called a piano hinge).
You will need to make sure the door clears the downward-angled shtender top when it opens. If you don’t want a gap above the door, you can add a small lip to the underside of the shtender top that is even with or lower than the lowest point of the shtender top.
You can use a cabinet-door latch to hold the door shut.
If you have additional questions or would like clarification on anything, don’t hesitate to post here.