fix(#132): tests image (3)

.gitlab-ci.yml

@@ -137,7 +137,11 @@ tests:
       when: never
     - if: '$CI_MERGE_REQUEST_ID || $CI_COMMIT_BRANCH == "master"'
       when: manual
+  variables:
+    DEBIAN_FRONTEND: noninteractive
   script:
+    - apt-get update
+    - apt-get install -y clang cmake protobuf-compiler
     # cargo build is required for cucumber tests anyway
     - cargo build
     - cargo tu