refactor : move lobby into its own module

src/app.module.ts

@@ -14,6 +14,7 @@ import { ConceptInTurn } from './games/entities/concept_in_turn.entity';
 import { ConfigService } from '@nestjs/config';
 import { WordModule } from './word/words.module';
 import { Message } from './games/entities/message.entity';
+import { LobbyModule } from './lobby/lobby.module';
 
 const configService = new ConfigService();
 
@@ -43,6 +44,7 @@ const configService = new ConfigService();
         Word,
       ],
     }),
+    LobbyModule,
     GamesModule,
     UsersModule,
     WordModule,