feat: Convert helpers to use JS files

packages/backend/src/helpers/web-ui-handler.js

@@ -0,0 +1,21 @@
+import express from 'express';
+import { dirname, join } from 'path';
+import appConfig from '../config/app';
+
+const webUIHandler = async (app) => {
+  if (appConfig.serveWebAppSeparately) return;
+
+  const webAppPath = require.resolve('@automatisch/web');
+  const webBuildPath = join(dirname(webAppPath), 'build');
+  const indexHtml = join(dirname(webAppPath), 'build', 'index.html');
+
+  app.use(express.static(webBuildPath));
+  app.get('*', (_req, res) => {
+    res.set('Content-Security-Policy', 'frame-ancestors: none;');
+    res.set('X-Frame-Options', 'DENY');
+
+    res.sendFile(indexHtml);
+  });
+};
+
+export default webUIHandler;