JMIATRY 7 Inch Hidden Door Hinges Heavy Duty Invisible Door Hinge 180 Degree Swing Concealed Doors Hinge Zinc Alloy 3 Way Adjustable Butt Hinges 7 x 2.8 x 1 Inch Black

For sure finish all sides. OP take this with thr biggest grain of salt. This is a bit out of my element. But this is what came to my mind. Not sure if this would work here or not. https://a.co/d/0fif9jCs