Test command substitution

.gitlab-ci.yml

@@ -27,7 +27,9 @@ build-job:       # This job runs in the build stage, which runs first.
   tags:
     - build
   script:
-
+    - echo "Test with command substitution"
+    - FILES=$(ls)
+    - echo $FILES
     - echo "Compiling the code..."
     - echo "Compile complete."
     - |