Some obedience training will help but in the mean time you need some gates to keep her away from the door. You may have to keep her in one part of the house.
I had this problem with Gracie when she was a puppy. She just loved to get out the front door. Once she actually left with a repair person!
I had to pick her up and hold her before anyone could open the door. If we had workers around then I would put her harness and leash on and keep her right with me. Once I put her in a bedroom to be safe but someone let her out when I wasn't looking.
I know how stressful it is to try to catch one of these escape artists! Another thing that helped with Gracie was when I started walking her outside more. It seemed to help satisfy her need to investigate the world outside the door. It helps use up that pent up energy, too.