Try to set proxy for pull

conan-el7-gcc115/.gitlab-ci.yml

@@ -24,8 +24,7 @@ before_script:
 build:
     stage: build
     script:
-        - echo "DOCKER_HOST=$DOCKER_HOST"
-        - docker build --pull -t ${CONTAINER_TEST_IMAGE} -f ${NAME}/Dockerfile .
+        - docker build --build-arg http_proxy --build-arg https_proxy --build-arg no_proxy --pull -t ${CONTAINER_TEST_IMAGE} -f ${NAME}/Dockerfile .
         - docker push ${CONTAINER_TEST_IMAGE}
 
 test: