Try to fix build pipeline (microsoft#203951)

Author: alexr00

build/azure-pipelines/alpine/cli-build-alpine.yml

@@ -7,6 +7,9 @@ parameters:
     default: false
   - name: VSCODE_QUALITY
     type: string
+  - name: VSCODE_CHECK_ONLY
+    type: boolean
+    default: false
 
 steps:
   - task: NodeTool@0