feat: add combined frontend and API Docker deployment

apps/api/src/web.ts

@@ -0,0 +1,20 @@
+import { existsSync } from 'node:fs';
+import { join } from 'node:path';
+import { Express, static as serveStatic } from 'express';
+
+/** Serve only the current Vite assets and page entries; leave service routes to Nest/OAuth. */
+export function installWeb(app: Express, directory = join(__dirname, '../public')) {
+  const index = join(directory, 'index.html');
+  if (!existsSync(index)) return false;
+
+  app.use('/assets', serveStatic(join(directory, 'assets'), { index: false, redirect: false }));
+  const pages = new Set(['/', '/agent/authorize', '/agent/operation']);
+  app.use((req, res, next) => {
+    if (!['GET', 'HEAD'].includes(req.method) || !pages.has(req.path)) return next();
+    res.setHeader('Cache-Control', 'no-store');
+    res.sendFile(index, (error) => {
+      if (error) next(error);
+    });
+  });
+  return true;
+}