fetch db structure

flake.nix

@@ -0,0 +1,45 @@
+{
+  description = "FastAPI with Cloud Firestore development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        
+        # Python with required packages
+        pythonEnv = pkgs.python312.withPackages (ps: with ps; [
+          fastapi
+          uvicorn
+          google-cloud-firestore
+          pydantic
+          python-dotenv
+        ]);
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            pythonEnv
+            git
+            curl
+          ];
+
+          shellHook = ''
+            echo "FastAPI + Firestore development environment"
+            echo ""
+            echo "Python: $(python --version)"
+            echo "Packages: fastapi, uvicorn, google-cloud-firestore, pydantic"
+            echo ""
+            echo "Quick start:"
+            echo "  1. Place your serviceAccountKey.json in this directory"
+            echo "  2. Create main.py with your FastAPI app"
+            echo "  3. Run: uvicorn main:app --reload"
+            echo ""
+          '';
+        };
+      });
+}