gha debugging

.github/workflows/nix.yml

@@ -0,0 +1,40 @@
+# First pass at a nix-based GHA setup for penumbra-guide.
+name: Validate nix env for GHA
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*.*.*"
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  check_nix:
+    name: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: git checkout
+        uses: actions/checkout@v3
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Check Nixpkgs inputs
+        uses: DeterminateSystems/flake-checker-action@main
+        with:
+          fail-mode: true
+
+      # Nix-specific logic begins here
+      - name: install pnpm deps
+        run: |
+          nix develop --command \
+            pnpm install
+      - name: build static docroot
+        run: |
+          nix develop --command \
+            pnpm build
+      - name: view built docroot
+        run: |
+          find ./out