add nix shell

default.nix

@@ -0,0 +1,14 @@
+{ pkgs ? import <nixpkgs> {} }:
+  pkgs.mkShell {
+    # nativeBuildInputs is usually what you want -- tools you need to run
+    nativeBuildInputs = with pkgs.buildPackages; [ 
+      python3Packages.uvloop
+      python3Packages.click
+      python3Packages.uvicorn
+      python3Packages.httpx
+      python3Packages.loguru
+      python3Packages.pydantic
+      python3Packages.python-dotenv
+      poetry 
+    ];
+}