Update deploy.yml

Author: TingluoHuang

.github/workflows/deploy.yml

@@ -20,7 +20,7 @@ on:
 
 env:
   AZURE_WEBAPP_NAME: deserializerV2   # set this to your application's name
-  AZURE_WEBAPP_PACKAGE_PATH: '.'      # set this to the path to your web app project, defaults to the repository root
+  AZURE_WEBAPP_PACKAGE_PATH: './build'      # set this to the path to your web app project, defaults to the repository root
   NODE_VERSION: '12.x'                # set this to the node version to use
 
 jobs: