Update README.md to include installing git to enable flake to function

README.md

@@ -7,7 +7,7 @@ first, you must edit /etc/nixos/configuration.nix to include the following:
   ...
 }: {
   imports = [
-    ...
+    <...>
   ];
 
   nix.settings.experimental-features = [
@@ -15,9 +15,15 @@ first, you must edit /etc/nixos/configuration.nix to include the following:
     "flakes"
   ];
 
-  ...
+  <...>
 
   networking.hostname = "<hostname>";
+
+  <...>
+
+  environment.systemPackages = with pkgs; [
+    git
+  ];
 }
 ```