Add portable build file

Author: Javier-varez

Diff for: .gitignore

@@ -3,3 +3,4 @@ public/
 .direnv
 .hugo_build.lock
 result/
+nix-portable

Diff for: flake.nix

@@ -39,9 +39,12 @@
           pkgs.hugo
         ];
 
+        patchPhase = ''
+          mkdir -p themes/
+          cp -r ${even-theme}/ themes/even
+        '';
+
         buildPhase = ''
-          mkdir -p themes/even/
-          cp -r ${even-theme} themes/even
           hugo ${extraBuildArgs}
         '';
 

Diff for: portable_build.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+set -e
+
+curl -L https://github.com/DavHau/nix-portable/releases/latest/download/nix-portable-$(uname -m) > ./nix-portable
+chmod +x ./nix-portable
+
+./nix-portable nix build
+./nix-portable nix-shell -p bash --run "cp -rL result public"