add direnv

.envrc

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+if [[ $(type -t use_flake) != function ]]; then
+    echo "ERROR: direnv's use_flake function missing. update direnv to v2.30.0 or later." && exit 1
+fi
+use flake
+dotenv

.gitignore

@@ -0,0 +1 @@
+.direnv

flake.nix

@@ -5,8 +5,9 @@
   };
 
   outputs =
-    { self, flake-parts, ... }:
+    inputs@{ flake-parts, ... }:
-    flake-parts.lib.mkFlake { inherit self; } {
+    # https://flake.parts/module-arguments.html
+    flake-parts.lib.mkFlake { inherit inputs; } {
       flake = {
         # Put your original flake attributes here.
       };