Update .gitlab-ci.yml

1 job for master in 57 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #2040
Docker
Linux client build

00:00:57

 
Name Stage Failure
failed
Linux client build Build
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/builds/deed/khaganat-web/khaganat-web/khaganat/settings.py", line 15, in <module>
from decouple import config, Csv
ModuleNotFoundError: No module named 'decouple'
ERROR: Job failed: exit code 1