How to stop cold air from coming in through door frame?

Some additional pictures here: https://ift.tt/acMU5z2 air comes in during the winter and we lose cold air in the summer.Seems obvious that I’ll need to replace that rubber seam but also wondering (worried?) that the door is too far away from the wall and is always going to let some air in. via /r/DIY https://ift.tt/gAqsudK