add devshell

.envrc

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

.gitignore

@@ -37,4 +37,7 @@ node_modules
 /target
 
 # .env
-.env
+.env
+
+# .direnv
+.direnv

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1742889210,
+        "narHash": "sha256-hw63HnwnqU3ZQfsMclLhMvOezpM7RSB0dMAtD5/sOiw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "698214a32beb4f4c8e3942372c694f40848b360d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,32 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    inputs@{
+      self,
+      nixpkgs,
+      ...
+    }:
+    let
+      forSystems = f: nixpkgs.lib.attrsets.genAttrs nixpkgs.lib.systems.flakeExposed (system: f system);
+      pkgs' = system: nixpkgs.legacyPackages.${system};
+    in
+    {
+      devShells = forSystems (
+        system:
+        let
+          pkgs = pkgs' system;
+        in
+        {
+          default = pkgs.mkShell {
+            packages = with pkgs; [
+              corepack_latest
+              nodejs
+            ];
+          };
+        }
+      );
+    };
+}