Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -9,7 +9,7 @@ build:
   # instead of calling g++ directly you can also use some build toolkit like make
   # install the necessary build tools when needed
   before_script:
-    - apt update && apt -y install make autoconf
+    - apt update && apt -y install make autoconf qt5-default qt5-qmake
   script:
     - qmake
     - make