I'd second Jim Mc's advice. I have 6 handmade doors at my cabin
made from maple plywood with pine frames. Due to the varying humidity levels, they warp over 2" from top to bottom. I use latches
to lock the top of the door against the back wall, then use boards to force the bottom out. After a week, I'll add another board so the "de-warping" is done in stages. Two or three weeks and they are back straight, until the season changes. (they warp in the summer and winter).