feat(backend): Express-Server liefert statisch + /api/health

server/index.js

@@ -0,0 +1,17 @@
+const path = require('path');
+const express = require('express');
+
+const app = express();
+app.use(express.json({ limit: '5mb' }));
+
+app.get('/api/health', (req, res) => res.json({ status: 'ok' }));
+
+// Statisches Frontend (Repo-Root). Dotfiles werden per Default nicht ausgeliefert.
+app.use(express.static(path.join(__dirname, '..')));
+
+if (require.main === module) {
+  const PORT = process.env.PORT || 3000;
+  app.listen(PORT, '0.0.0.0', () => console.log(`Dienstplan-Pro auf :${PORT}`));
+}
+
+module.exports = app;