Update .gitlab-ci.yml file

.gitlab-ci.yml

+image: node:latest
+
+stages:          # List of stages for jobs, and their order of execution
+  - build
+  - test
+
+build-job:       # This job runs in the build stage, which runs first.
+  stage: build
+  script:
+    - npm ci
+
+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:
+    - npm run test:unit
+
+e2e-test-job:    # This job runs in the test stage.
+  stage: test    # It only starts when the job in the build stage completes successfully.
+  script:
+    - npm run test:e2e