If you're lucky, the paint will hold for a while anyway. It might be an idea to paint it one more time with acrylic transparent lacquer, to prevent your door from going dirty and to make it washable (latex paint takes on dirt easily).
If the time comes that the paint comes off, you can still do abrasing or taking the paint of with chemicals. But while your door is still looking good, just relax! Happy new year, Evelien