Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -5,13 +5,21 @@ stages:          # List of stages for jobs, and their order of execution
   - build
   - test
 
+# Cache modules in between jobs
+cache:
+  key: 
+    files:
+      - package-lock.json
+  paths:
+    - .npm/
+
+before_script:
+  - npm ci --cache .npm --prefer-offline
+
 npm:
   stage: npm
   script:
     - npm ci
-  cache:
-    paths:
-      - node_modules/
 
 build-job:       # This job runs in the build stage, which runs first.
   stage: build