[Projeto] unable to prepare context: path "./app/" not found

Pessoal, eu baixei o conteudo da aula 2, e o docker-compose esta dando seguinte erro:

                                                                                                                                                                                                                  3.3s
   ⠿ e6170f30a38d Pull complete                                                                                                                                                                                                                          4.4s
   ⠿ 5aaacfdc4145 Pull complete                                                                                                                                                                                                                          4.4s
   ⠿ 5420b5446248 Pull complete                                                                                                                                                                                                                          4.5s
   ⠿ 8a2ab86e3ff1 Pull complete                                                                                                                                                                                                                          4.6s
   ⠿ 3dab14bd0e8c Pull complete                                                                                                                                                                                                                          4.7s
   ⠿ 5bce46b63ac9 Pull complete                                                                                                                                                                                                                          5.1s
   ⠿ 00cd3198f364 Pull complete                                                                                                                                                                                                                          5.2s
   ⠿ cbd4b912d9ee Pull complete                                                                                                                                                                                                                          5.3s
   ⠿ 7e5bc43c7502 Pull complete                                                                                                                                                                                                                          6.1s
 ⠿ client-forum-api Warning                                                                                                                                                                                                                              4.8s
 ⠿ app-forum-api Warning                                                                                                                                                                                                                                 4.4s
[+] Building 0.0s (0/0)                                                                                                                                                                                                                                       
unable to prepare context: path "./app/" not found