Upgrade node from 7 to 8 for Docker Image (#577)
Upgrade node from 7 to 8 for Docker Image (#577)

Chatie/wechaty,wechaty/wechaty,zixia/wechaty,Chatie/wechaty,wechaty/wechaty,binsee/wechaty,zixia/wechaty,lijiarui/wechaty,Chatie/wechaty,wechaty/wechaty,mukaiu/wechaty,mukaiu/wechaty,lijiarui/wechaty,binsee/wechaty,binsee/wechaty,mukaiu/wechaty