Build the docs on PRs

.github/workflows/pr.yaml

@@ -0,0 +1,46 @@
+name: Build only
+
+on:
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+env:
+  CANONICAL_DOMAIN: www.spinkube.dev
+  SPIN_OPERATOR_RELEASE: v0.1.0
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      HUGO_VERSION: 0.123.0
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Hugo CLI
+        run: |
+          wget -O ${{ runner.temp }}/hugo.deb https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.deb \
+          && sudo dpkg -i ${{ runner.temp }}/hugo.deb
+
+      - name: Install Node.js dependencies
+        run: npm install
+
+      - name: Setup Go environment
+        uses: actions/setup-go@v5.0.0
+
+      - name: Generate CRD reference docs
+        run: ./generate.sh
+        working-directory: ./crd-reference
+        env:
+          SPIN_OPERATOR_RELEASE: ${{ env.SPIN_OPERATOR_RELEASE }}
+
+      - name: Build
+        run: |
+          hugo \
+            --gc \
+            --minify \
+            --baseURL "https://${{ env.CANONICAL_DOMAIN }}/"