chore: flake.nix setup

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1726243404,
+        "narHash": "sha256-sjiGsMh+1cWXb53Tecsm4skyFNag33GPbVgCdfj3n9I=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "345c263f2f53a3710abe117f28a5cb86d0ba4059",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,33 @@
+{
+  description = "My development environment";
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  };
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    systems = [
+      "x86_64-linux"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ];
+    forAllSystems = f:
+      nixpkgs.lib.genAttrs systems (system: let
+        pkgs = import nixpkgs {inherit system;};
+      in
+        f system pkgs);
+  in {
+    devShells = forAllSystems (system: pkgs: {
+      default = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          eslint
+          nodejs_22
+          nodePackages_latest.prettier
+          bun
+        ];
+      };
+    });
+  };
+}