Add github build

Author: ejsmith

.github/workflows/build.yml

@@ -0,0 +1,36 @@
+name: Build and Test
+
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 22
+        cache: 'npm'
+        
+    - name: Install dependencies
+      run: npm ci
+      
+    - name: Build site
+      run: npm run build
+      
+    - name: Check build output
+      run: |
+        if [ ! -d "_site" ]; then
+          echo "Build failed: _site directory not found"
+          exit 1
+        fi
+        if [ ! -f "_site/index.html" ]; then
+          echo "Build failed: index.html not found in _site"
+          exit 1
+        fi
+        echo "Build successful: $(find _site -type f | wc -l) files generated"