Garden hose, wash it down. While it is drying figure out how the coyote got into the coop. Lawn sprayer with a touch of chlorine added (disinfectant) to spray the coop. While you are waiting for it to dry, wire, plug, fence, board to prevent another coyote from getting in your coop.
Thats a pretty big hole in your coop if a coyote fits throug it.
I would not get any more chickens untill i had a safe and secure home for them to roost in at night.