Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -2,6 +2,9 @@
 # Official language image. Look for the different tagged releases at:
 # https://hub.docker.com/r/library/python/tags/
 image: python:3.8
+variables:
+  DOCKER_BUILDKIT: 0
+
 #commands to run in the Docker container before starting each job.
 before_script:
   - pip install -r ./requirements.txt