chore: add flake.nix

add instructions for nix

.github/CONTRIBUTING.md

@@ -96,6 +96,8 @@ ### Using the GitHub editor
 
 ### Manually setting up a development environment
 
+#### Manually
+
 1. Fork the repository by clicking the "Fork" button in the top right corner.
 
 2. Make sure you have [Node.js](https://nodejs.org/en/), [pnpm](https://pnpm.io/), [git](https://git-scm.com/), and [VSCode](https://code.visualstudio.com/) or any other editor installed.
@@ -107,3 +109,21 @@ ### Manually setting up a development environment
 5. Add your changes with git (`git add <file>`) and commit (`git commit -m "commit message"`), then push them (`git push`).
 
 6. Create a pull request by clicking the "New Pull Request" button in your forked repository, and don't forget to explain why you think the site(s) in question should be removed, unstarred, and/or changed.
+
+#### Nix
+
+You can use [nix](https://nixos.org/) to set up a development environment, we have a [flake](https://nixos.wiki/wiki/Flakes) that setups `nodejs` and `pnpm`.
+
+1. Fork the repository by clicking the "Fork" button in the top right corner and clone your forked repository to your local machine.
+
+2. Run `nix flake update` to update the flake lock file.
+
+3. Run `nix develop` to enter the development environment.
+
+4. Make changes. 
+
+5. Exit the development environment by running `exit`.
+
+6. Commit your changes and push them to your forked repository.
+
+7. Create a pull request by clicking the "New Pull Request" button in your forked repository, and don't forget to explain why you think the site(s) in question should be removed, unstarred, and/or changed.

.gitignore

@@ -9,3 +9,4 @@ node_modules
 dist
 .eslintcache
 docs/.vitepress/.temp
+result

default.nix

@@ -1,7 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-
-pkgs.mkShell {
-  buildInputs = [
-    pkgs.nodejs_20
-  ];
-}

docs/.vitepress/theme/style.scss

@@ -35,11 +35,12 @@ :root {
   --vp-custom-block-tip-text: theme('colors.meadow.800');
   --vp-custom-block-tip-text-deep: theme('colors.meadow.900');
   /** Warning */
-  --vp-custom-block-warning-bg: theme('colors.merlin.100'),
-    --vp-custom-block-warning-border: theme('colors.merlin.800'),
-    --vp-custom-block-warning-text: theme('colors.merlin.800'),
-    --vp-custom-block-warning-text-deep: theme('colors.merlin.900'),
-    /** Danger */ --vp-custom-block-danger-bg: theme('colors.carnation.100');
+  --vp-custom-block-warning-bg: theme('colors.merlin.100');
+  --vp-custom-block-warning-border: theme('colors.merlin.800');
+  --vp-custom-block-warning-text: theme('colors.merlin.800');
+  --vp-custom-block-warning-text-deep: theme('colors.merlin.900');
+  /** Danger */
+  --vp-custom-block-danger-bg: theme('colors.carnation.100');
   --vp-custom-block-danger-border: theme('colors.carnation.800');
   --vp-custom-block-danger-text: theme('colors.carnation.800');
   --vp-custom-block-danger-text-deep: theme('colors.carnation.900');

flake.nix

@@ -0,0 +1,26 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+  };
+  outputs = {nixpkgs, ...}: let
+    forAllSystems = f:
+      nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+        f pkgs);
+  in {
+    packages = forAllSystems (pkgs: {
+      formatter = pkgs.alejandra;
+    });
+
+    devShells = forAllSystems (pkgs: {
+      default = pkgs.mkShell {
+        packages = with pkgs; [
+          nodejs
+          pnpm
+          git
+        ];
+      };
+    });
+  };
+}