The Extreme Cold Is Coming, I Stocked up the Entire Safe House

Seven days before the extreme cold came, I was reborn. In my last life, I died on the 30th day of the apocalypse. Before my death, my neighbor broke open the door and snatched away the last charcoal. In this life, I directly took over the entire old apartment left by my parents, stocked up on food, medicine, coal, and water, welded the doors shut, sealed off the back alleys, and transformed the entire building into a safe house. While others are still robbing the supermarket, I have already started to distribute heat sources; while others are still waiting for rescue, I have already established the rules for the building. But when a snowstorm closed the city, people began to die outside the door, and someone in the building tried to open the door secretly, I discovered that the neighbor who killed me in the previous life also came back. In this life, whoever wants to rob my building will die outside the door.