feat: add nestjs api and worker skeletons

backend/apps/worker/src/worker.bootstrap.spec.ts

@@ -0,0 +1,16 @@
+import { bootstrapWorker } from './main';
+
+describe('bootstrapWorker', () => {
+  it('creates an application context without starting an HTTP listener', async () => {
+    const close = jest.fn().mockResolvedValue(undefined);
+    const enableShutdownHooks = jest.fn();
+    const appContext = { close, enableShutdownHooks };
+    const createContext = jest.fn().mockResolvedValue(appContext);
+
+    const app = await bootstrapWorker(createContext as never);
+
+    expect(createContext).toHaveBeenCalledTimes(1);
+    expect(enableShutdownHooks).toHaveBeenCalledTimes(1);
+    expect(app).toBe(appContext);
+  });
+});