try alt build image

.github/workflows/blogtini.yml

@@ -37,6 +37,10 @@ jobs:
   # Build job
   build:
     runs-on: ubuntu-latest
+    container:
+      # something with `deno` and `zsh`
+      # https://gitlab.com/internetarchive/nomad
+      image: docker://registry.gitlab.com/internetarchive/nomad/master
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -51,7 +55,8 @@ jobs:
           path: _blogtini
       - name: Blogtini SSR head elements & sitemap
         run: |
-          sudo apt-get install -yqq zsh
+          set -x
+          # sudo apt-get install -yqq zsh
           mkdir -p _site/bin
           mv _blogtini/bin/* _site/bin/
           mv * _site/ || echo fine