Prepared demo files and demo explanation file. Added debug only button to trigger demo file ingest on the server to queue and prepare the files. Added small expressjs server for talking between the web app and the rust engine containers.

web-app/server.mjs

@@ -0,0 +1,44 @@
+import express from 'express';
+import path from 'node:path';
+import helmet from 'helmet';
+import cors from 'cors';
+import { fileURLToPath } from 'node:url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const app = express();
+const PORT = process.env.PORT || 3000;
+const RUST_ENGINE_BASE = process.env.RUST_ENGINE_BASE || 'http://rust-engine:8000';
+
+app.use(helmet());
+app.use(cors());
+app.use(express.json());
+
+// Proxy minimal API needed by the UI to the rust-engine container
+app.post('/api/files/import-demo', async (req, res) => {
+  try {
+    const qs = req.url.includes('?') ? req.url.substring(req.url.indexOf('?')) : '';
+    const url = `${RUST_ENGINE_BASE}/api/files/import-demo${qs}`;
+    const upstream = await fetch(url, { method: 'POST' });
+    const text = await upstream.text();
+    res.status(upstream.status).type(upstream.headers.get('content-type') || 'application/json').send(text);
+  } catch (err) {
+    console.error('import-demo proxy failed:', err);
+    res.status(502).json({ error: 'proxy_failed' });
+  }
+});
+
+// Serve static frontend
+const distDir = path.resolve(__dirname, 'dist');
+app.use(express.static(distDir));
+
+// SPA fallback
+app.get('*', (req, res) => {
+  res.sendFile(path.join(distDir, 'index.html'));
+});
+
+app.listen(PORT, '0.0.0.0', () => {
+  console.log(`Web app server listening on http://0.0.0.0:${PORT}`);
+  console.log(`Proxying to rust engine at ${RUST_ENGINE_BASE}`);
+});