Leaking anti freeze small puddle on passenger side of car

Coolant leaks just once in awhile. Doesn't leak when I'm driving it and no warning light comes on. Ran errands yesterday , no leaks got home and couple of hours later I went out and coolant had leaked out...the last time this happened was about 2 months ago. The hoses look good.

My car only leaks coolant from the driver side I'm guessing the overflow. It only does it once the car is shut off. While driving the temperature gauge does not show over heating, as I know sometimes the air while driving keeps it cool but even when idle it doesn't over heat it only does it when the car is turned off after driving or sitting in the car while it is running. I would love to be have any ideas of what's happening and if anyone knows where I could start???