edit docker setting file

Author: yunheli

docker/app-api.properties

@@ -38,7 +38,7 @@ jfiglet.message =  FlowCi Started Success
 ## plugin repos url
 plugins.repository = https://raw.githubusercontent.com/flowci/plugins/master/repository.json
 
-api.run.indocker = false
+api.run.indocker = true
 
 task.job.toggle.execution_timeout = true
 ## 6s expire job