Initial nix

.envrc

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+# .envrc
+use flake

flake.nix

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+{
+    description = "The Open Food Network is an online marketplace for local food.";
+
+    inputs = {
+      nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+      flake-utils = {
+        url = "github:numtide/flake-utils";
+        inputs.nixpkgs.follows = "nixpkgs";
+      };
+    };
+
+    outputs = { self, nixpkgs, flake-utils }:
+    let
+      systems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
+      outputs = flake-utils.lib.eachSystem systems (system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in rec {
+        devShells.default = pkgs.mkShell {
+          buildInputs = [
+            pkgs.ruby
+            pkgs.bundler
+            pkgs.postgresql_16_jit
+            pkgs.nodejs_21
+            pkgs.redis
+            pkgs.shared-mime-info
+            pkgs.libyaml
+            pkgs.yarn
+          ] ;
+          shellHook = pkgs.lib.optionalString pkgs.stdenv.isDarwin ''
+            export CPATH=$(xcrun --sdk macosx --show-sdk-path)/usr/include
+
+          '';
+        };
+      });
+    in outputs // {};
+
+    nixConfig = {};
+}