docs: updated read me

README.md

@@ -2,8 +2,45 @@
 
 _An opinionated setup for projects using MfGames Writing._
 
-This is a setup flake that adds in the various packages used by MfGames Writing.
+This is a setup flake that adds in the various packages used by MfGames Writing. It is intended to be used along with [mfgames-project-setup](https://mfgames.com/mfgames-project-setup-flake/) to provide additional functionality.
+
+## Nix
+
+This project is intended to be used with [Nix](https://nixos.wiki/wiki/Flakes) flakes and can be used directly as an input.
+
+```nix
+{
+  inputs = {
+    mfgames-project-setup.url = "git+https://src.mfgames.com/nixos-contrib/mfgames-project-setup-flake.git";
+    mfgames-writing-setup.url = "git+https://src.mfgames.com/nixos-contrib/mfgames-writing-setup-flake.git";
+  };
+}
+```
+
+This flake provides a function in `mfgames-writing-setup.lib.mkConfig` that
+creates a shell hook and the various tools required to run those hooks (because
+programs like `lefthook` assume that the program is in the `PATH`).
+
+```nix
+devShell =
+  let
+    project-config = mfgames-project-setup.lib.mkConfig {
+      inherit system;
+      prettier.proseWrap = "never"; # Used to avoid line wrapping at 80 columns
+    };
+    writing-config = mfgames-writing-setup.lib.mkConfig {
+      inherit system;
+    };
+  in
+  pkgs.mkShell {
+    packages = [ ]
+      ++ project-config.packages
+      ++ writing-config.packages;
+
+    shellHook = project-config.shellHook;
+  };
+```
 
 ## Configuration
 
-There are currently no configuration options.
+There are currently no configuration options with this flake, but the project setup flake contains some options.