Init bun and flake file

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1738680400,
+        "narHash": "sha256-ooLh+XW8jfa+91F1nhf9OF7qhuA/y1ChLx6lXDNeY5U=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "799ba5bffed04ced7067a91798353d360788b30d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,25 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs@{ nixpkgs, ... }:
+    let
+      system = "x86_64-linux";
+    in
+    {
+      devShells.${system}.default =
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+          };
+        in
+        pkgs.mkShell {
+          packages = with pkgs; [
+            bun
+          ];
+
+          shellHook = "fish";
+        };
+    };
+}

package.json

@@ -35,7 +35,8 @@
     "pino-pretty": "^13.0.0",
     "ts-jest": "^29.2.5",
     "ts-node": "^10.9.2",
-    "typescript": "^5.7.3"
+    "typescript": "^5.7.3",
+    "@types/bun": "latest"
   },
   "prettier": {
     "semi": false,