Add gc

nix/nixos/configuration.nix

@@ -41,6 +41,7 @@
   users.users.pan = {
     isNormalUser = true;
     extraGroups = [ "networkmanager" "wheel" ];
+    uid = 1000;
     shell = pkgs.zsh;
   };
 
@@ -52,9 +53,19 @@
 
   nixpkgs.config.allowUnfree = true;
 
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 7d";
+  };
+
+  # Automatic Store Optimization
+  nix.settings.auto-optimise-store = true;
+
   environment.systemPackages = with pkgs; [
     git
     wget
     curl
+    vim
   ];
 }