Update .gitlab-ci.yml

.gitlab-ci.yml

+image: node:12
+
+cache:
+  key: ${CI_COMMIT_SHA}_node_modules
+  untracked: true
+  paths:
+    - node_modules/
+  policy: pull-push
+
 stages:
+  - prepare
   - build
   - deploy
-before_script:
-  - echo "before_script"
-precompiled:
-  stage: build
-  tags:
-    - build
+
+install_dependencies:
+  stage: prepare
   script:
-    - echo "Hello precompiled"
-# 测试环境
-test-env:
-  stage: deploy
-  tags:
-    - build
-  environment:
-    name: development
+    - yarn install --frozen-lockfile
+
+build_code:
+  stage: build
+  only:
+    - dev
+    - beta
+    - production
+  environment: $CI_COMMIT_BRANCH
   script:
-    - echo "Hello precompiled"
+    - yarn run build
\ No newline at end of file
+  artifacts:
+    name: "${CI_COMMIT_SHA}_build"
+    untracked: true
+    paths:
+      - build/
+    expire_in: 3 hrs