feat: initial scaffolding

api/src/app/app.spec.ts

@@ -0,0 +1,20 @@
+import Fastify, { FastifyInstance } from 'fastify';
+import { app } from './app';
+
+describe('GET /', () => {
+  let server: FastifyInstance;
+
+  beforeEach(() => {
+    server = Fastify();
+    server.register(app);
+  });
+
+  it('should respond with a message', async () => {
+    const response = await server.inject({
+      method: 'GET',
+      url: '/',
+    });
+
+    expect(response.json()).toEqual({ message: 'Hello API' });
+  });
+});