renamed mod -> modules in hosts->kepler | add /etc/nixos to git as safe dir

hosts/kepler/modules/users.nix

@@ -0,0 +1,15 @@
+_:
+{
+  users.users.user = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" "docker" "network" "plugdev" ];
+  
+    openssh.authorizedKeys.keys = [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDdCJK3NBMbGwvSxXq0kp/FzWUU0l0D1WX8f4vBubtZ7" ];
+  };
+  security = {
+    doas = {
+      enable = true;
+      extraConfig = "permit nopass keepenv :wheel";
+    };
+  };
+}