feat: add nix flake (#593)

Co-authored-by: Samuel Gunter <29130894+Samathingamajig@users.noreply.github.com>

.editorconfig

@@ -7,3 +7,6 @@ insert_final_newline = true
 trim_trailing_whitespace = true
 indent_size = 4
 indent_style = space
+
+[*.nix]
+indent_size = 2

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -211,3 +211,5 @@ sketch
 package-lock.json
 storybook-static/
 package/
+
+.direnv/

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1744932701,
+        "narHash": "sha256-fusHbZCyv126cyArUwwKrLdCkgVAIaa/fQJYFlCEqiU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b024ced1aac25639f8ca8fdfc2f8c4fbd66c48ef",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,32 @@
+{
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    inputs:
+    inputs.flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = (import (inputs.nixpkgs) { inherit system; });
+      in
+      {
+        formatter = pkgs.nixfmt-rfc-style;
+
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            nodejs_20 # v20.19.0
+            pnpm_10 # v10.8.1
+            just
+          ];
+
+          shellHook = ''
+            echo "UTRP Nix Flake Environment Loaded"
+            echo "Node: $(node --version)"
+            echo "pnpm: $(pnpm --version)"
+          '';
+        };
+      }
+    );
+}