refactor backend and persist stock campaign queue

backend/server.js

@@ -0,0 +1,25 @@
+const express = require('express');
+const cors = require('cors');
+const bodyParser = require('body-parser');
+const authRoutes = require('./routes/authRoutes');
+const dataRoutes = require('./routes/dataRoutes');
+const stockRoutes = require('./routes/stockRoutes');
+const internalRoutes = require('./routes/internalRoutes');
+
+const createApp = () => {
+    const app = express();
+
+    app.use(cors());
+    app.use(bodyParser.json());
+
+    app.use('/api', authRoutes);
+    app.use('/api', dataRoutes);
+    app.use('/api', stockRoutes);
+    app.use('/api/internal', internalRoutes);
+
+    return app;
+};
+
+module.exports = {
+    createApp
+};