add a nix flake for this project (#8)

flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "Docker Pod";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/release-22.11";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [ go gotools golangci-lint gopls gopkgs go-outline ];
+        };
+        packages = {
+          default = pkgs.buildGoModule {
+            pname = "babashka-pod-docker";
+            version = "0.0.1";
+            src = ./.;
+            vendorSha256 = "sha256-KUWqddPcv+hLStd7JEzQBUiGLPLYwfmyVoG1BtaHWXY=";
+            postInstall = ''
+              	        mv $out/bin/parser $out/bin/babashka-pod-docker
+              	        '';
+
+          };
+        };
+      });
+}