Add flake

flake.nix

@@ -0,0 +1,42 @@
+{
+  description = "Container Packing";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs.devshell.url = "github:numtide/devshell";
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    devshell,
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = import nixpkgs {
+        inherit system;
+        config.allowUnfree = true;
+        overlays = [devshell.overlays.default];
+      };
+
+      myPython = pkgs.python312.withPackages (p:
+        with p; [
+          # Basic
+          rich
+
+          matplotlib
+          numpy
+          ezdxf
+        ]);
+    in {
+      devShell = pkgs.devshell.mkShell {
+        name = "Formula10";
+
+        packages = with pkgs; [
+          myPython
+        ];
+
+        # Use $1 for positional args
+        commands = [];
+      };
+    });
+}