我尝试将Gitlab CI与docker-compose结合使用，但总是收到此错误：
$ docker-compose up -d --build
Creating network "backoffice_default" with the default driver
Building php
Creating backoffice_database_1 ...
Creating backoffice_database_1 ... done
Creating backoffice_php_1 ...
Creating backoffice_php_1 ... done
$ docker-compose exec php composer -v
Traceback (most recent call last):
File "bin/docker-compose", line 6, in <module>
File "compose/cli/main.py", line 68, in main
File "compose/cli/main.py", line 121, in perform_command
File "compose/cli/main.py", line 464, in exec_command
File "site-packages/dockerpty/pty.py", line 338, in start
File "site-packages/dockerpty/io.py", line 32, in …