feat: basic api

server/src/routes/transactions.ts

@@ -0,0 +1,17 @@
+import express from 'express';
+import { Transaction } from "@shared/interfaces/transaction"
+
+const router = express.Router();
+
+// Mock data
+const mockTransactions: Transaction[] = [
+  { id: '1', partner: 'Alice Smith', amount: 50.00, date: new Date('2026-03-01'), type: 'Received' },
+  { id: '2', partner: 'Bob Johnson', amount: -25.50, date: new Date('2026-02-28'), type: 'Sent' },
+];
+
+// GET /api/transactions
+router.get('/', (req, res) => {
+  res.json(mockTransactions);
+});
+
+export default router;