tried to fix .gitlab-ci.yml

.gitlab-ci.yml

@@ -1,9 +1,23 @@
 # This file is generated by GitLab CI
-Npm, Bower, Grunt:
+stages:
+  - clean
+  - build
+
+cleanup:
+  stage: clean
   script:
-  - npm install
+    - rm -r node_modules
-  - bower install
+    - rm -r bower_components
-  - grunt
   tags:
   except:
-  - tags
+    - tags
+
+Npm, Bower, Grunt:
+  stage: build
+  script:
+    - npm install
+    - bower install
+    - grunt
+  tags: 
+  except:
+    - tags