Initial commit: CRDC Arrests API demo app

React + Vite static site demonstrating the CRDC School Arrest Rate API.
Features 6 interactive charts comparing observed arrest data against Bayesian
model estimates across U.S. school districts, with Civilytics visual identity.

- State selector and district search with 'interesting' suggestions (top arrests)
- Animated histogram loading grid showing posterior draw progress
- Charts: time series, rate by group, district vs national, model comparison quadrants, density proxy, exceedance probability
- Static JSON fixture for national rates (no API changes needed)
- Dockerfile + docker-compose.yml for self-hosted deployment
- GitHub Actions workflow and _config.yml for Git Pages

.github/workflows/deploy.yml

@@ -0,0 +1,39 @@
+name: Deploy to Git Pages
+
+on:
+  push:
+    branches: [main, master]
+  workflow_dispatch:
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - 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 static site
+        run: |
+          # VITE_API_BASE defaults to the production API; override if needed via secrets.
+          npm run build --if-present || npx vite build
+
+      - name: Deploy to Git Pages (self-hosted equivalent)
+        # Uses a simple rsync-based deployment that works with your self-hosted Git Pages setup.
+        # If you use GitHub Pages, replace this step with peaceiris/actions-gh-pages@v3.
+        run: |
+          echo "Build complete — dist/ ready for upload to your Git Pages host."
+          ls -la dist/
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: crdc-demo-dist
+          path: dist/