changed the gitlab ci to handle npm test

.gitlab-ci.yml

@@ -11,7 +11,7 @@ build:
     - mongo:latest
   script:
     - apk add nodejs-current nodejs-npm
-    - npm install -g mocha
+    - npm install mocha
     - mocha --timeout 10000 --exit
     - git submodule init
     - git submodule update