Added installation of cmake into .yml file

.gitlab-ci.yml

@@ -9,6 +9,11 @@ build_codes:
         artifacts:
                 paths:
                         - build/
+        before_script:
+                - 'apt-get -y update'
+                - 'apt-get -y install cmake'
+                - 'apt-get -y upgrade'
+
         script:
                 - 'cmake -Bbuild -S.'
                 - 'cmake --build'