feat: Add nix flake with python and dependencies

.envrc

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

flake.nix

@@ -0,0 +1,50 @@
+{
+  description = "Masterblaser Flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    # Helpers for producing system-specific outputs
+    supportedSystems = ["x86_64-linux" "aarch64-darwin"];
+    forEachSupportedSystem = f:
+      nixpkgs.lib.genAttrs supportedSystems (system:
+        f {
+          pkgs = import nixpkgs {inherit system;};
+        });
+  in {
+    # Development environments
+    devShells = forEachSupportedSystem ({pkgs}: {
+      default = pkgs.mkShell {
+        # Pinned packages available in the environment
+        packages = with pkgs; [
+          python311
+          (with python311Packages; [
+            aiohttp
+            dateutils
+          ])
+        ];
+
+        # Environment variables
+        env = {
+          ACCESS_TOKEN = "";
+          ORG_ID = "";
+          ORG_NAME = "";
+          MB_BASE_URL = "https://app.bedriftsligaen.no/api";
+          NUMBER_OF_MEMBERS = "";
+          TEAM_NAME = "";
+        };
+
+        # A hook run every time you enter the environment
+        # Can load variables from `.env` file
+        shellHook = ''
+          set -a; source .env; set +a
+        '';
+      };
+    });
+  };
+}