tried to fix .gitlab-ci.yml

.gitlab-ci.yml

@@ -1,5 +1,19 @@
 # This file is generated by GitLab CI
+stages:
+  - clean
+  - build
+
+cleanup:
+  stage: clean
+  script:
+    - rm -r node_modules
+    - rm -r bower_components
+  tags:
+  except:
+    - tags
+
 Npm, Bower, Grunt:
+  stage: build
   script:
     - npm install
     - bower install