DevOps: How to use caching and artifacts in GitLab CI?

1cache:
2  key:
3    files:
4      - package-lock.json
5  paths:
6    - node_modules/
7  policy: pull-push
8
9# Read only
10cache:
11  key: ${CI_COMMIT_REF_SLUG}
12  paths:
13    - node_modules/
14  policy: pull

1build:
2  stage: build
3  script:
4    - npm ci && npm run build
5  artifacts:
6    paths:
7      - dist/
8    expire_in: 1 week
9    when: on_success
10
11deploy:
12  stage: deploy
13  dependencies:
14    - build
15  script:
16    - aws s3 sync dist/ s3://my-bucket/
17
18# Tests with reports
19test:
20  script:
21    - npm test -- --coverage
22  artifacts:
23    reports:
24      junit: test-results.xml
25      coverage_report:
26        coverage_format: cobertura
27        path: coverage/cobertura.xml
28    when: always