Update .gitlab-ci.yml file

set DEBIAN_FRONTEND envvar in aptcache

.gitlab-ci.yml

@@ -27,6 +27,7 @@ stages:          # List of stages for jobs, and their order of execution
 .aptcache_Scripts: &aptcache
   - export APT_CACHE_DIR=`pwd`/apt-cache
   - mkdir --parents --verbose $APT_CACHE_DIR/partial/
+  - export DEBIAN_FRONTEND=noninteractive
 
 default:
   image: debian:stable-slim
@@ -37,7 +38,6 @@ default:
     CCACHE_MAXSIZE: "50M"
     GIT_STRATEGY: clone
     GIT_CLONE_PATH: $CI_BUILDS_DIR/$CI_CONCURRENT_ID/$CI_PROJECT_PATH
-    ENV DEBIAN_FRONTEND: noninteractive
   cache:
     - key: ccache-$CI_PROJECT_PATH_SLUG-$CI_JOB_NAME_SLUG
       fallback_keys: