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

vite.config.mjs

@@ -0,0 +1,8 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react-swc'
+
+export default defineConfig({
+  plugins: [react()],
+  server: { port: 5173 },
+  build: { outDir: 'dist', sourcemap: true },
+})