I have the same coop. For a long time it was my only coop. I had six standard sized hens. I closed the door at night. Mine did not have any hardware cloth at the bottom, though mine was inside a dog run, too. It’s definitely not a large coop. I wasn’t super vigilant about closing the door, sometime after the chickens went in on their own at night and there were nights I did forget and thankfully nothing bad happened. Now that coop is home to three bantams (more what it’s really suited for, IMO) and it’s inside a run with electric fencing and I close the door at night when I close the door on the standard birds’ coop.