auto(agent): Add test for offers route

backend/src/__tests__/offers.test.js

@@ -0,0 +1,12 @@
+const test = require('node:test');
+const assert = require('assert');
+const { app } = require('../app');
+
+test('GET /offers should return offers', async () => {
+  const response = await app.inject({
+    method: 'GET',
+    url: '/offers'
+  });
+  assert.strictEqual(response.statusCode, 200);
+  assert.strictEqual(response.headers['content-type'], 'application/json; charset=utf-8');
+});