Add testing job and Renovate config

.github/renovate.json

@@ -1,5 +1,6 @@
 {
   "extends": [
-    "config:base"
+    "config:base",
+    "github>dimension-sh/renovate-config:hugo"
   ]
-}
+}

.github/workflows/test-build.yaml

@@ -0,0 +1,40 @@
+name: Test Build
+"on":
+  push:
+    branches:
+      - "*"
+    pull_request:
+
+# Default to bash
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  test_build:
+    runs-on: ubuntu-latest
+    env:
+      HUGO_VERSION: 0.124.1
+    steps:
+      - 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 Dart Sass
+        run: sudo snap install dart-sass
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          fetch-depth: 0
+      - name: Install Node.js dependencies
+        run: "[[ -f package-lock.json || -f npm-shrinkwrap.json ]] && npm ci || true"
+      - name: Build with Hugo
+        env:
+          # For maximum backward compatibility with Hugo modules
+          HUGO_ENVIRONMENT: production
+          HUGO_ENV: production
+        run: |
+          hugo \
+            --gc \
+            --minify