Doors in a restaurant should be sealed tightly into the door frames. if you can see daylight in the cracks, this should be repaired because food safety could be at risk if

food safety could be at risk if outside pests can enter the building.

Explanation:

Food safety is very important and should be a top priority in restaurants. Eating infections are dangerous, uncomfortable and lessens the credibility of the establishment. For this reason, restaurants must adopt certain attitudes that allow food safety. One such attitude is the use of doors that adhere well to the frames, so as not to let anything pass. This attitude is important because it prevents external pests from entering the building and contaminating food.

it'll be alright, just keep on going and keep your head up!