Join game

src/game/game.controller.spec.ts

+import { Test, TestingModule } from '@nestjs/testing';
+import { GameController } from './game.controller';
+
+describe('Game Controller', () => {
+  let controller: GameController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [GameController],
+    }).compile();
+
+    controller = module.get<GameController>(GameController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});