Make cicd work

.gitlab-ci.yml

@@ -10,6 +10,10 @@ build:
   # install the necessary build tools when needed
   # before_script:
   #   - apt update && apt -y install make autoconf
+  before_script:
+    - apt-get update --yes
+    - apt-get install --yes cmake
+
   script:
     - mkdir build
     - cd build