Add validation step for Hugo

.github/workflows/validate.yaml

@@ -0,0 +1,33 @@
+name: Validate Hugo site
+
+on: pull_request
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      HUGO_VERSION: 0.140.1
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: recursive
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - name: Setup Hugo
+        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 ${{ runner.temp }}/hugo.deb
+      - name: Build with Hugo
+        env:
+          HUGO_ENVIRONMENT: production
+          HUGO_ENV: production
+        run: |
+          hugo --gc --minify --baseURL "${{ steps.pages.outputs.base_url }}/"