Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -16,6 +16,12 @@
 # This specific template is located at:
 # https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Getting-Started.gitlab-ci.yml
 
+image: node:latest
+
+cache:
+  paths:
+    - node_modules/
+
 stages:          # List of stages for jobs, and their order of execution
   - build
   - test
@@ -32,6 +38,7 @@ unit-test-job:   # This job runs in the test stage.
   stage: test    # It only starts when the job in the build stage completes successfully.
   script:
     - echo "Running unit tests..."
+    - npm i
     - npm test
 
 lint-test-job:   # This job also runs in the test stage.