As responsible neighbours we can all help out by making sure our front door doesn't slam shut each time we use it. Remember, your neighbours are quite close and probably hear it slamming. You can adjust the door to close properly with just a small ladder or step stool and a screwdriver.
Be safe doing it of course, but reach up to the door closer and look for two screws on the inside near where it attaches to the door. (see picture)
Adjust one way a couple of turns and try the door, adjust the other way if necessary until the door closes softly. Be a good neighbour!