initial commit, template added

flake.nix

@@ -0,0 +1,28 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    {
+      nixpkgs,
+      ...
+    }:
+    let
+      system = "x86_64-linux";
+      pkgs = import nixpkgs {
+        inherit system;
+        config = {
+          allowUnfree = true;
+        };
+      };
+    in
+    {
+      devShells."${system}".default = pkgs.mkShell {
+        packages = [
+          pkgs.jetbrains.idea-ultimate
+          pkgs.jdk21
+        ];
+      };
+    };
+}