Update .gitlab-ci.yml

.gitlab-ci.yml

-# 设置执行镜像
-image: node 12
-
-# 整个pipeline有两个stage
 stages:
-- build
-- test
+  - prepare
+  - test
+  - build
 
-# 定义全局缓存，缓存的key来自分支信息，缓存位置是vendor文件夹
 cache:
-  key: ${CI_COMMIT_REF_SLUG}
+  key: ${CI_COMMIT_SHA}_node_modules
+  untracked: true
   paths:
-  - vendor/
-
-before_script:
-  - echo "Before script section"
+    - node_modules/
+  policy: pull-push
 
-after_script:
-  - echo "After script section"
+install_dependences: 
+  image: node:12
+  stage: prepare
+  script: yarn install
 
-build1:
+.build_job:
   stage: build
+  image: node:12
   script:
-    - echo "将内容写入缓存"
-    - echo "build" > vendor/hello.txt
-
-test1:
-  stage: test
-  script:
-    - echo "从缓存读取内容"
-    - cat vendor/hello.txt
+    - echo "build"
+    - yarn build
+  artifacts:
+    paths:
+      - build/
+    untracked: false
+    expire_in: 30 days
+build_1:
+  extends: .build_job
+
+build_2:
+  extends: .build_job